多线程下载的原理
司马光砸缸,多开几个小水管,抢救小朋友。
import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.InputStream; import java.io.InputStreamReader; import java.io.RandomAccessFile; import java.net.HttpURLConnection; import java.net.URL; public class MutileThreadDownload { /** * 线程的数量 */ private static int threadCount = 3; /** * 每个下载区块的大小 */ private static long blocksize; /** * 正在运行的线程的数量 */ private static int runningThreadCount; /** * @param args * @throws Exception */ public static void main(String[] args) throws Exception { // 服务器文件的路径 String path = "http://192.168.1.100:8080/ff.exe"; URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(5000); int code = conn.getResponseCode(); if (code == 200) { long size = conn.getContentLength();// 得到服务端返回的文件的大小 System.out.println("服务器文件的大小:" + size); blocksize = size / threadCount; // 1.首先在本地创建一个大小跟服务器一模一样的空白文件。 File file = new File("temp.exe"); RandomAccessFile raf = new RandomAccessFile(file, "rw"); raf.setLength(size); // 2.开启若干个子线程分别去下载对应的资源。 runningThreadCount = threadCount; for (int i = 1; i <= threadCount; i++) { long startIndex = (i - 1) * blocksize; long endIndex = i * blocksize - 1; if (i == threadCount) { // 最后一个线程 endIndex = size - 1; } System.out.println("开启线程:" + i + "下载的位置:" + startIndex + "~" + endIndex); new DownloadThread(path, i, startIndex, endIndex).start(); } } conn.disconnect(); } private static class DownloadThread extends Thread { private int threadId; private long startIndex; private long endIndex; private String path; public DownloadThread(String path, int threadId, long startIndex, long endIndex) { this.path = path; this.threadId = threadId; this.startIndex = startIndex; this.endIndex = endIndex; } @Override public void run() { try { // 当前线程下载的总大小 int total = 0; File positionFile = new File(threadId + ".txt"); URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url .openConnection(); conn.setRequestMethod("GET"); // 接着从上一次的位置继续下载数据 if (positionFile.exists() && positionFile.length() > 0) {// 判断是否有记录 FileInputStream fis = new FileInputStream(positionFile); BufferedReader br = new BufferedReader( new InputStreamReader(fis)); // 获取当前线程上次下载的总大小是多少 String lasttotalstr = br.readLine(); int lastTotal = Integer.valueOf(lasttotalstr); System.out.println("上次线程" + threadId + "下载的总大小:" + lastTotal); startIndex += lastTotal; total += lastTotal;// 加上上次下载的总大小。 fis.close(); } conn.setRequestProperty("Range", "bytes=" + startIndex + "-" + endIndex); conn.setConnectTimeout(5000); int code = conn.getResponseCode(); System.out.println("code=" + code); InputStream is = conn.getInputStream(); File file = new File("temp.exe"); RandomAccessFile raf = new RandomAccessFile(file, "rw"); // 指定文件开始写的位置。 raf.seek(startIndex); System.out.println("第" + threadId + "个线程:写文件的开始位置:" + String.valueOf(startIndex)); int len = 0; byte[] buffer = new byte[512]; while ((len = is.read(buffer)) != -1) { RandomAccessFile rf = new RandomAccessFile(positionFile, "rwd"); raf.write(buffer, 0, len); total += len; rf.write(String.valueOf(total).getBytes()); rf.close(); } is.close(); raf.close(); } catch (Exception e) { e.printStackTrace(); } finally { // 只有所有的线程都下载完毕后 才可以删除记录文件。 synchronized (MutileThreadDownload.class) { System.out.println("线程" + threadId + "下载完毕了"); runningThreadCount--; if (runningThreadCount < 1) { System.out.println("所有的线程都工作完毕了。删除临时记录的文件"); for (int i = 1; i <= threadCount; i++) { File f = new File(i + ".txt"); System.out.println(f.delete()); } } } } } } }
多线程断点下载的原理
同上
多线程断点下载的移植
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.itheima.mutilethread" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.itheima.mutilethread.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="请输入下载文件的路径" /> <EditText android:id="@+id/et_path" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="http://192.168.101.138:2222/zuihou.mp3" /> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="请输入线程的数量" /> <EditText android:id="@+id/et_count" android:layout_width="fill_parent" android:layout_height="wrap_content" android:inputType="number" android:text="3" /> <Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:onClick="downLoad" android:text="下载" /> <LinearLayout android:id="@+id/ll_container" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > </LinearLayout> </LinearLayout>
pb.xml
<?xml version="1.0" encoding="utf-8"?> <ProgressBar xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/progressBar1" style="?android:attr/progressBarStyleHorizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" />
package com.itheima.mutilethread; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.InputStream; import java.io.InputStreamReader; import java.io.RandomAccessFile; import java.net.HttpURLConnection; import java.net.URL; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.os.Message; import android.text.TextUtils; import android.view.View; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.ProgressBar; import android.widget.Toast; public class MainActivity extends Activity { protected static final int DOWNLOAD_ERROR = 1; private static final int THREAD_ERROR = 2; public static final int DWONLOAD_FINISH = 3; private EditText et_path; private EditText et_count; /** * 存放进度条的布局 */ private LinearLayout ll_container; /** * 进度条的集合 */ private List<ProgressBar> pbs; /** * android下的消息处理器,在主线程创建,才可以更新ui */ private Handler handler = new Handler(){ public void handleMessage(Message msg) { switch (msg.what) { case DOWNLOAD_ERROR: Toast.makeText(getApplicationContext(), "下载失败", 0).show(); break; case THREAD_ERROR: Toast.makeText(getApplicationContext(), "下载失败,请重试", 0).show(); break; case DWONLOAD_FINISH: Toast.makeText(getApplicationContext(), "下载完成", 0).show(); break; } }; }; /** * 线程的数量 */ private int threadCount = 3; /** * 每个下载区块的大小 */ private long blocksize; /** * 正在运行的线程的数量 */ private int runningThreadCount; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_path = (EditText) findViewById(R.id.et_path); et_count = (EditText) findViewById(R.id.et_count); ll_container = (LinearLayout) findViewById(R.id.ll_container); } /** * 下载按钮的点击事件 * @param view */ public void downLoad(View view){ //下载文件的路径 final String path = et_path.getText().toString().trim(); if(TextUtils.isEmpty(path)){ Toast.makeText(this, "对不起下载路径不能为空", 0).show(); return; } String count = et_count.getText().toString().trim(); if(TextUtils.isEmpty(path)){ Toast.makeText(this, "对不起,线程数量不能为空", 0).show(); return; } threadCount = Integer.parseInt(count); //清空掉旧的进度条 ll_container.removeAllViews(); //在界面里面添加count个进度条 pbs = new ArrayList<ProgressBar>(); for(int j=0;j<threadCount;j++){ ProgressBar pb = (ProgressBar) View.inflate(this, R.layout.pb, null); ll_container.addView(pb); pbs.add(pb); } Toast.makeText(this, "开始下载", 0).show(); new Thread(){ public void run() { try { URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(5000); int code = conn.getResponseCode(); if (code == 200) { long size = conn.getContentLength();// 得到服务端返回的文件的大小 System.out.println("服务器文件的大小:" + size); blocksize = size / threadCount; // 1.首先在本地创建一个大小跟服务器一模一样的空白文件。 File file = new File(Environment.getExternalStorageDirectory(),getFileName(path)); RandomAccessFile raf = new RandomAccessFile(file, "rw"); raf.setLength(size); // 2.开启若干个子线程分别去下载对应的资源。 runningThreadCount = threadCount; for (int i = 1; i <= threadCount; i++) { long startIndex = (i - 1) * blocksize; long endIndex = i * blocksize - 1; if (i == threadCount) { // 最后一个线程 endIndex = size - 1; } System.out.println("开启线程:" + i + "下载的位置:" + startIndex + "~" + endIndex); int threadSize = (int) (endIndex - startIndex); pbs.get(i-1).setMax(threadSize); new DownloadThread(path, i, startIndex, endIndex).start(); } } conn.disconnect(); } catch (Exception e) { e.printStackTrace(); Message msg = Message.obtain(); msg.what = DOWNLOAD_ERROR; handler.sendMessage(msg); } }; }.start(); } private class DownloadThread extends Thread { private int threadId; private long startIndex; private long endIndex; private String path; public DownloadThread(String path, int threadId, long startIndex, long endIndex) { this.path = path; this.threadId = threadId; this.startIndex = startIndex; this.endIndex = endIndex; } @Override public void run() { try { // 当前线程下载的总大小 int total = 0; File positionFile = new File(Environment.getExternalStorageDirectory(),getFileName(path)+threadId + ".txt"); URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url .openConnection(); conn.setRequestMethod("GET"); // 接着从上一次的位置继续下载数据 if (positionFile.exists() && positionFile.length() > 0) {// 判断是否有记录 FileInputStream fis = new FileInputStream(positionFile); BufferedReader br = new BufferedReader( new InputStreamReader(fis)); // 获取当前线程上次下载的总大小是多少 String lasttotalstr = br.readLine(); int lastTotal = Integer.valueOf(lasttotalstr); System.out.println("上次线程" + threadId + "下载的总大小:" + lastTotal); startIndex += lastTotal; total += lastTotal;// 加上上次下载的总大小。 fis.close(); //存数据库。 //_id path threadid total } conn.setRequestProperty("Range", "bytes=" + startIndex + "-" + endIndex); conn.setConnectTimeout(5000); int code = conn.getResponseCode(); System.out.println("code=" + code); InputStream is = conn.getInputStream(); File file = new File(Environment.getExternalStorageDirectory(),getFileName(path)); RandomAccessFile raf = new RandomAccessFile(file, "rw"); // 指定文件开始写的位置。 raf.seek(startIndex); System.out.println("第" + threadId + "个线程:写文件的开始位置:" + String.valueOf(startIndex)); int len = 0; byte[] buffer = new byte[1024]; while ((len = is.read(buffer)) != -1) { RandomAccessFile rf = new RandomAccessFile(positionFile, "rwd"); raf.write(buffer, 0, len); total += len; rf.write(String.valueOf(total).getBytes()); rf.close(); pbs.get(threadId-1).setProgress(total); } is.close(); raf.close(); } catch (Exception e) { e.printStackTrace(); Message msg = Message.obtain(); msg.what = THREAD_ERROR; handler.sendMessage(msg); } finally { // 只有所有的线程都下载完毕后 才可以删除记录文件。 synchronized (MainActivity.class) { System.out.println("线程" + threadId + "下载完毕了"); runningThreadCount--; if (runningThreadCount < 1) { System.out.println("所有的线程都工作完毕了。删除临时记录的文件"); for (int i = 1; i <= threadCount; i++) { File f = new File(Environment.getExternalStorageDirectory(),getFileName(path)+ i + ".txt"); System.out.println(f.delete()); } Message msg = Message.obtain(); msg.what = DWONLOAD_FINISH; handler.sendMessage(msg); } } } } } //http://192.168.1.100:8080/aa.exe private String getFileName(String path){ int start = path.lastIndexOf("/")+1; return path.substring(start); } }
开源项目xutils
xUtils-master.zip
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity" > <EditText android:id="@+id/et_path" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="http://192.168.101.138:2222/zuihou.mp3" /> <Button android:onClick="download" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="下载" /> <TextView android:id="@+id/tv_info" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="TextView" /> </LinearLayout>
xUtils-2.4.7.jar
package com.itheima.download2; import java.io.File; import android.app.Activity; import android.os.Bundle; import android.text.TextUtils; import android.view.View; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; import com.lidroid.xutils.HttpUtils; import com.lidroid.xutils.exception.HttpException; import com.lidroid.xutils.http.HttpHandler; import com.lidroid.xutils.http.ResponseInfo; import com.lidroid.xutils.http.callback.RequestCallBack; public class MainActivity extends Activity { private EditText et_path; private TextView tv_info; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_path = (EditText) findViewById(R.id.et_path); tv_info = (TextView) findViewById(R.id.tv_info); } public void download(View view) { String path = et_path.getText().toString().trim(); if (TextUtils.isEmpty(path)) { Toast.makeText(this, "请输入下载的路径", 0).show(); return; } else { HttpUtils http = new HttpUtils(); HttpHandler handler = http.download(path, "/sdcard/abc.mp3", true, // 如果目标文件存在,接着未完成的部分继续下载。服务器不支持RANGE时将从新下载。 true, // 如果从请求返回信息中获取到文件名,下载完成后自动重命名。 new RequestCallBack<File>() { @Override public void onStart() { tv_info.setText("conn..."); } @Override public void onLoading(long total, long current, boolean isUploading) { tv_info.setText(current + "/" + total); } @Override public void onSuccess(ResponseInfo<File> responseInfo) { tv_info.setText("downloaded:" + responseInfo.result.getPath()); } @Override public void onFailure(HttpException error, String msg) { tv_info.setText(msg); } }); } } }
显示意图
人品计算器的案例
隐式意图
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.itheima.intent2" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.itheima.intent2.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="com.itheima.intent2.SecondActivity" > <intent-filter> <action android:name="com.itheima.intent2.open2" /> <category android:name="android.intent.category.DEFAULT" /> <data android:mimeType="application/person" /> <data android:scheme="jianren" /> </intent-filter> </activity> </application> </manifest>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <Button android:onClick="click" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="隐式意图激活界面" /> </RelativeLayout>
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="我是第二个界面" android:textAppearance="?android:attr/textAppearanceLarge" /> </LinearLayout>
package com.itheima.intent2; import android.app.Activity; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.view.View; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void click(View view) { // 打 action // 人 数据 // 附件的数据 Category 类别 Intent intent = new Intent(); intent.setAction("com.itheima.intent2.open2"); intent.addCategory(Intent.CATEGORY_DEFAULT); // URL:统一资源定位符 http https ftp rtsp: URI:统一资源标识符 url是uri的一个子集 // intent.setData(Uri.parse("jianren:张三")); // intent.setType("application/person"); intent.setDataAndType(Uri.parse("jianren:张三"), "application/person"); startActivity(intent); } }
package com.itheima.intent2; import android.app.Activity; import android.os.Bundle; public class SecondActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_second); } }
打开浏览器
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.itheima.openbrowser" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.itheima.openbrowser.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <Button android:onClick="click" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="打开百度" /> </RelativeLayout>
package com.itheima.openbrowser; import android.app.Activity; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.view.View; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void click(View view){ // <action android:name="android.intent.action.VIEW" /> // <category android:name="android.intent.category.DEFAULT" /> // <category android:name="android.intent.category.BROWSABLE" /> // <data android:scheme="http" /> // <data android:scheme="https" /> // <data android:scheme="about" /> // <data android:scheme="javascript" /> Intent intent = new Intent(); intent.setAction("android.intent.action.VIEW"); intent.addCategory("android.intent.category.DEFAULT"); intent.addCategory("android.intent.category.BROWSABLE"); intent.setData(Uri.parse("http://www.baidu.com")); startActivity(intent); } }
人品计算器
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.itheima.rpcalc" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.itheima.rpcalc.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="com.itheima.rpcalc.CalcActivity" android:label="@string/title_activity_calc" > </activity> </application> </manifest>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <Button android:id="@+id/bt_calc" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:onClick="enter" android:text="点击进入人品计算器" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:src="@drawable/rp" /> <EditText android:id="@+id/et_name" android:layout_centerHorizontal="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/bt_calc" android:hint="请输入要计算的姓名" /> </RelativeLayout>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".CalcActivity" > <TextView android:id="@+id/tv_result" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="我是计算器页面" /> </RelativeLayout>
package com.itheima.rpcalc; import java.util.Random; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.widget.TextView; public class CalcActivity extends Activity { private TextView tv_result; //当activity被创建的时候调用的方法 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_calc); tv_result = (TextView) findViewById(R.id.tv_result); Intent intent = getIntent(); String name = intent.getStringExtra("name"); byte[] result = name.getBytes(); int number = 0; for(byte b :result){ number += b&0xff; } int sorce = Math.abs(number)%100; tv_result.setText(name+"的人品:"+sorce); } }
package com.itheima.rpcalc; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.text.TextUtils; import android.view.View; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends Activity { private EditText et_name; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_name = (EditText) findViewById(R.id.et_name); } //显式意图 :必须指定要激活的组件的完整包名和类名 (应用程序之间耦合在一起) // 一般激活自己应用的组件的时候 采用显示意图 //隐式意图: 只需要指定要动作和数据就可以 ( 好处应用程序之间没有耦合) //激活别人写的应用 隐式意图, 不需要关心对方的包名和类名 public void enter(View view){ String name = et_name.getText().toString().trim(); if(TextUtils.isEmpty(name)){ Toast.makeText(this, "请输入姓名", 0).show(); return; } //意图 开电视 打人 打酱油 Intent intent = new Intent(this, CalcActivity.class); intent.putExtra("name", name); //显式意图 //intent.setClassName(getPackageName(), "com.itheima.rpcalc.CalcActivity");//不指定动作,也不指定数据 直接指定要激活的组件 startActivity(intent); //隐式意图 //intent.setAction(action); //intent.setData(data); } }
开启activity获取返回值
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.itheima.smshelper" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <uses-permission android:name="android.permission.SEND_SMS"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.itheima.smshelper.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="com.itheima.smshelper.ListSmsActivity" > </activity> <activity android:name="com.itheima.smshelper.ListNumberActivity" > </activity> </application> </manifest>
sms_item.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:id="@+id/tv_info" android:layout_width="match_parent" android:layout_height="wrap_content" android:drawableLeft="@android:drawable/star_big_on" android:gravity="center_vertical" android:text="我爱你。" /> </LinearLayout>
activity_sms.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <ListView android:id="@+id/lv" android:layout_width="match_parent" android:layout_height="match_parent" > </ListView> </LinearLayout>
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity" > <EditText android:id="@+id/et_number" android:layout_width="fill_parent" android:layout_height="wrap_content" android:hint="请输入电话号码" /> <EditText android:id="@+id/et_content" android:layout_width="fill_parent" android:layout_height="wrap_content" android:hint="请输入短信的内容" android:inputType="textMultiLine" android:lines="5" /> <Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:onClick="selectSms" android:text="选择短信" /> <Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:onClick="selectNumber" android:text="选择电话号码" /> <Button android:onClick="sendSms" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="发送短信" /> </LinearLayout>
package com.itheima.smshelper; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ListView; public class ListNumberActivity extends Activity { private ListView lv; private String[] objects = { "1234","34324","5643543","32424" }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_sms); lv = (ListView) findViewById(R.id.lv); lv.setAdapter(new ArrayAdapter<String>(this, R.layout.sms_item, R.id.tv_info, objects)); lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { String smsinfo = objects[position]; Intent data = new Intent(); data.putExtra("smsinfo", smsinfo); //设置数据。 setResult(1, data); //关闭掉当前的activity,并且回传数据 onActivityResult(). finish(); } }); } }
package com.itheima.smshelper; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ListView; public class ListSmsActivity extends Activity { private ListView lv; private String[] objects = { "玫瑰香香,情人黏黏,情话甜甜,情歌绵绵;花灯灿灿,礼花点点,好运连连,好梦圆圆。情人节喜逢元宵节,喜鹊登枝蝴蝶成双鸳鸯成对双喜临门祝双节快乐,合家团团圆圆,甜甜蜜蜜,开开心心,幸幸福福", "情人节快到了,我精心挑选玫瑰花、百合花和满天星,扎成一束鲜花随短信送给你,火红的玫瑰代表热烈奔放,洁白的百合代表百年好合,小小的满天星代表幸福美好。愿你的情人节热烈奔放,你们的爱情百年好合,你们的生活幸福美满。预祝情人节快乐", "^o^满天星光,最爱你许过愿望的那一颗,鲜花绽放,最爱你摘下微笑的那一朵,曼妙旋律,最爱你感动落泪的那一段,亲爱的,情人节快乐,爱你。 ", "^o^宝贝,情人节到了,送你一束玫瑰,用真心塑料纸包扎,系上快乐彩带,喷点爱的香水,插一张真情卡片,写着:宝贝,愿我的爱能带给你一生的快乐!" }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_sms); lv = (ListView) findViewById(R.id.lv); lv.setAdapter(new ArrayAdapter<String>(this, R.layout.sms_item, R.id.tv_info, objects)); lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { String smsinfo = objects[position]; Intent data = new Intent(); data.putExtra("smsinfo", smsinfo); //设置数据。 setResult(0, data); //关闭掉当前的activity,并且回传数据 onActivityResult(). finish(); } }); } }
package com.itheima.smshelper; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.telephony.SmsManager; import android.view.View; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends Activity { private EditText et_content; private EditText et_number; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_content = (EditText) findViewById(R.id.et_content); et_number = (EditText) findViewById(R.id.et_number); } public void selectSms(View view) { Intent intent = new Intent(this, ListSmsActivity.class); // 开启一个新的界面,并且获取界面的返回值 // startActivity(intent); // int requestCode 请求码 startActivityForResult(intent, 0); } public void selectNumber(View view) { Intent intent = new Intent(this, ListNumberActivity.class); // 开启一个新的界面,并且获取界面的返回值 // startActivity(intent); // int requestCode 请求码 startActivityForResult(intent, 1); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (data != null) { String smsinfo = data.getStringExtra("smsinfo"); if (resultCode == 0) { et_content.setText(smsinfo); } else if (resultCode == 1) { et_number.setText(smsinfo); } } super.onActivityResult(requestCode, resultCode, data); } public void sendSms(View view){ String content = et_content.getText().toString().trim(); String number = et_number.getText().toString().trim(); SmsManager.getDefault().sendTextMessage(number, null, content, null, null); Toast.makeText(this, "发送成功", 0).show(); } }
时间: 2024-10-02 20:22:29