最近，根据项目需求，需要一个能够自动分页的导航，所以便自定义了一个自动分页的GridView。
思路：继承RelativeLayout，然后在里面放了一个viewpager和一个GridView。。。我也不会说，还是直接上代码吧
先看看你效果图，分别是2行3列和1行3列（有自定义属性，可以自己定义几行几列）
接下来直接看源代码(很简单)
1 package custom.widget;
2
3 import android.annotation.TargetApi;
4 import android.content.Context;
5 import android.content.res.TypedArray;
6 import android.os.Build;
7 import android.support.v4.view.PagerAdapter;
8 import android.support.v4.view.ViewPager;
9 import android.util.AttributeSet;
10 import android.view.MotionEvent;
11 import android.view.View;
12 import android.view.ViewGroup;
13 import android.widget.AbsListView;
14 import android.widget.AdapterView;
15 import android.widget.BaseAdapter;
16 import android.widget.GridView;
17 import android.widget.LinearLayout;
18 import android.widget.RadioButton;
19 import android.widget.RadioGroup;
20 import android.widget.RelativeLayout;
21
22 import com.newair.automaticpagedemo.R;
23
24 import java.util.ArrayList;
25 import java.util.List;
26
27 /**
28 * Created by ouhimehime on 16/5/4.
29 * ----------自动分页的GridView----------
30 */
31 public class AutoMaticPageGridView extends RelativeLayout {
32
33 //分页所用
34 private ViewPager viewPager;
35 //导航点
36 private RadioGroup radioGroup;
37 //自定义行数
38 private int lines = 0;
39 //自定义列数
40 private int column = 0;
41 //自定义按钮样式
42 private int btn_res;
43 //自定义属性是否显示导航点
44 private boolean btn_isvisible;
45 //页数-需要动态计算
46 private int pages = 0;
47 //适配器
48 private BaseAutoAdapter adapter;
49 //Item的高度
50 private int itemHeight = 0;
51
52 //点击事件的接口
53 public interface OnItemClickCallBack {
54 void OnItemClicked(int position, Object object);
55 }
56
57 private OnItemClickCallBack onItemClickCallBack;
58
59 public void setOnItemClickListener(OnItemClickCallBack onItemClickCallBack) {
60 this.onItemClickCallBack = onItemClickCallBack;
61 }
62
63
64 public AutoMaticPageGridView(Context context) {
65 super(context);
66 }
67
68 public AutoMaticPageGridView(Context context, AttributeSet attrs) {
69 super(context, attrs);
70 init(context, attrs);
71 }
72
73 public AutoMaticPageGridView(Context context, AttributeSet attrs, int defStyleAttr) {
74 super(context, attrs, defStyleAttr);
75 init(context, attrs);
76 }
77
78 @TargetApi(Build.VERSION_CODES.LOLLIPOP)
79 public AutoMaticPageGridView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
80 super(context, attrs, defStyleAttr, defStyleRes);
81 init(context, attrs);
82 }
83
84
85 //初始化控件
86 private void init(Context context, AttributeSet attrs) {
87 //加载自定义属性
88 final TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.AutoMaticPageGridView);
89 lines = array.getInteger(R.styleable.AutoMaticPageGridView_auto_lines, 1);//行数
90 column = array.getInteger(R.styleable.AutoMaticPageGridView_auto_column, 4);//列数
91 btn_res = array.getResourceId(R.styleable.AutoMaticPageGridView_auto_button, 0);//btn的样式
92 btn_isvisible = array.getBoolean(R.styleable.AutoMaticPageGridView_auto_button_visible, true);//默认true
93 array.recycle();
94 //分页用
95 viewPager = new ViewPager(context);
96 viewPager.setLayoutParams(new LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
97 RelativeLayout.LayoutParams.MATCH_PARENT));
98 addView(viewPager);
99 //导航点用
100 radioGroup = new RadioGroup(context);
101 radioGroup.setOrientation(LinearLayout.HORIZONTAL);
102 RelativeLayout.LayoutParams params = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
103 params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
104 params.addRule(RelativeLayout.CENTER_IN_PARENT);
105 radioGroup.setLayoutParams(params);
106 addView(radioGroup);
107 //如果不显示的话就隐藏
108 if (!btn_isvisible) {
109 radioGroup.setVisibility(GONE);
110 }
111 }
112
113 //设置适配器
114 public void setAdapter(BaseAutoAdapter baseAdapter) {
115 this.adapter = baseAdapter;
116 //计算页数
117 if ((adapter.getCounts() / (column * lines)) > 0) {
118 pages = (adapter.getCounts() / (column * lines)) + 1; //多一页
119 } else {
120 pages = adapter.getCounts();
121 }
122 //添加radioButton
123 addRadioButton(pages);
124 this.post(new Runnable() {
125 @Override
126 public void run() {
127 itemHeight = getMeasuredHeight() / lines;
128 //显示viewpager
129 ViewPagerAdapter viewPagerAdapter = new ViewPagerAdapter(getContext());
130 viewPager.setAdapter(viewPagerAdapter);
131 //设置联动
132 initLinkAgeEvent();
133 }
134 });
135 }
136
137 //添加RadioButton
138 private void addRadioButton(int pages) {
139 for (int i = 0; i < pages; i++) {
140 RadioButton radioButton = new RadioButton(getContext());
141 radioButton.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
142 LinearLayout.LayoutParams.WRAP_CONTENT));
143 radioButton.setPadding(5, 5, 5, 5);//间距
144 radioButton.setId(i);//设置Id,方便联动
145 radioButton.setClickable(false);
146 if (btn_res != 0) { //设置按钮样式
147 radioButton.setButtonDrawable(btn_res);
148 }
149 radioGroup.addView(radioButton);
150 }
151 }
152
153 //给当前页计算数据数量
154 private List<View> getAdapterData(int position) {
155 List<View> cerrent = new ArrayList<>();
156 if (position == pages - 1) { //如果等于最后一页
157 for (int i = position * (lines * column); i < adapter.getCounts(); i++) {
158 cerrent.add(adapter.getItemView(i, null));
159 }
160 } else {
161 for (int i = position * (lines * column); i < position * (lines * column) + (lines * column); i++) {
162 cerrent.add(adapter.getItemView(i, null));
163 }
164 }
165 return cerrent;
166 }
167
168 //ViewPager适配器
169 private class ViewPagerAdapter extends PagerAdapter {
170
171 private Context context;
172
173 public ViewPagerAdapter(Context context) {
174 this.context = context;
175 }
176
177 @Override
178 public int getCount() {
179 return pages;
180 }
181
182 @Override
183 public boolean isViewFromObject(View view, Object object) {
184 return view == object;
185 }
186
187 @Override
188 public Object instantiateItem(ViewGroup container, int position) {
189 CustomGridView gridView = new CustomGridView(context);
190 gridView.setLayoutParams(new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT,
191 AbsListView.LayoutParams.MATCH_PARENT));
192 gridView.setNumColumns(column);//设置列数
193 gridView.setColumnWidth(GridView.AUTO_FIT);
194 GridViewAdapter adapter = new GridViewAdapter(getAdapterData(position), position);
195 gridView.setAdapter(adapter);
196 container.addView(gridView);
197 gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
198 @Override
199 public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
200 GridViewAdapter adapter1 = (GridViewAdapter) parent.getAdapter();
201 onItemClickCallBack.OnItemClicked(adapter1.currentPage * (lines * column) + position, view);
202 }
203 });
204 return gridView;
205 }
206
207 @Override
208 public void destroyItem(ViewGroup container, int position, Object object) {
209 container.removeView((GridView) object);
210 }
211 }
212
213 //GridView的适配器
214 private class GridViewAdapter extends BaseAdapter {
215
216 private List<View> views;//数据量
217 public int currentPage; //当前页
218
219 public GridViewAdapter(List<View> counts, int currentPage) {
220 this.views = counts;
221 this.currentPage = currentPage;
222 }
223
224 @Override
225 public int getCount() {
226 return views.size();
227 }
228
229 @Override
230 public Object getItem(int position) {
231 return position;
232 }
233
234 @Override
235 public long getItemId(int position) {
236 return position;
237 }
238
239 @Override
240 public View getView(int position, View convertView, ViewGroup parent) {
241 if (convertView == null) {
242 convertView = views.get(position);
243 convertView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, itemHeight));
244 }
245 return convertView;
246 }
247
248 }
249
250 //自定义GridView,禁止滑动
251 private class CustomGridView extends GridView {
252
253 public CustomGridView(Context context) {
254 super(context);
255 }
256
257 public CustomGridView(Context context, AttributeSet attrs) {
258 super(context, attrs);
259 }
260
261 public CustomGridView(Context context, AttributeSet attrs, int defStyleAttr) {
262 super(context, attrs, defStyleAttr);
263 }
264
265 @TargetApi(Build.VERSION_CODES.LOLLIPOP)
266 public CustomGridView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
267 super(context, attrs, defStyleAttr, defStyleRes);
268 }
269
270 @Override
271 public boolean dispatchTouchEvent(MotionEvent ev) {
272 if (ev.getAction() == MotionEvent.ACTION_MOVE) {
273 return true;//禁止GridView进行滑动
274 }
275 return super.dispatchTouchEvent(ev);
276 }
277 }
278
279 //初始化联动联动事件
280 private void initLinkAgeEvent() {
281 //默认选中第一个
282 viewPager.setCurrentItem(0);
283 radioGroup.check(radioGroup.getChildAt(0).getId());
284 //滑动换页事件
285 viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
286 @Override
287 public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
288
289 }
290
291 @Override
292 public void onPageSelected(int position) {
293 radioGroup.check(position);
294 }
295
296 @Override
297 public void onPageScrollStateChanged(int state) {
298
299 }
300 });
301 }
302
303 }
这个组件也有个适配器，很简单，就是定义了几个抽象方法
package custom.widget;
import android.view.View;
import android.view.ViewGroup;
/**
* Created by ouhimehime on 16/5/4.
* -----适配器=------
*/
public abstract class BaseAutoAdapter {
public abstract int getCounts(); //返回数据数量
public abstract Object getItem(int position); //当前Item的数据
public abstract View getItemView(int position, ViewGroup parent); //返回Item的布局
}
还自定义了一部分属性，方便使用起来好控制
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="AutoMaticPageGridView">
<!-- 行数 -->
<attr name="auto_lines" format="integer" />
<!-- 列数 -->
<attr name="auto_column" format="integer" />
<!-- button的样式 -->
<attr name="auto_button" format="reference" />
<!-- 是否显示导航点 -->
<attr name="auto_button_visible" format="boolean" />
</declare-styleable>
</resources>
-----------------------------------------------------------------------以上就是源代码了-----------------------------------------------------------------------------
下面是如何使用：（就当做一个控件来使用就可以）
①、先看布局文件XML,控件的高度是可以自己定义的
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:auto="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<custom.widget.AutoMaticPageGridView
android:id="@+id/automatic"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
auto:auto_button="@drawable/btn_status_style"
auto:auto_column="3"
auto:auto_lines="2" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2"/>
</LinearLayout>
②、再看适配器代码，适配器需要继承BaseAutoAdapter
package adapter;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.newair.automaticpagedemo.R;
import java.util.List;
import custom.widget.BaseAutoAdapter;
/**
* Created by ouhimehime on 16/5/4.
* ------------适配器------------
*/
public class MyAutoMaticPageAdapter extends BaseAutoAdapter {
private Context context;
private List<Integer> myData;
public MyAutoMaticPageAdapter(Context context, List<Integer> myData) {
this.context = context;
this.myData = myData;
}
@Override
public int getCounts() {
return myData.size();
}
@Override
public Object getItem(int position) {
return myData.get(position);
}
@Override
public View getItemView(int position, ViewGroup parent) {
View view = LayoutInflater.from(context).inflate(R.layout.item_layout, null);
return view;
}
}
③、再看主布局代码，为了方便我就随便放了放了10条数据
package com.newair.automaticpagedemo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import adapter.MyAutoMaticPageAdapter;
import custom.widget.AutoMaticPageGridView;
public class MainActivity extends AppCompatActivity {
private AutoMaticPageGridView automatic;
private MyAutoMaticPageAdapter adapter;
private List<Integer> myData;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
automatic = (AutoMaticPageGridView) findViewById(R.id.automatic);
myData = new ArrayList<>();
for (int i = 0; i < 10; i++) {
myData.add(i);
}
adapter = new MyAutoMaticPageAdapter(this, myData);
automatic.setAdapter(adapter);
//点击事件
automatic.setOnItemClickListener(new AutoMaticPageGridView.OnItemClickCallBack() {
@Override
public void OnItemClicked(int position, Object object) {
Toast.makeText(MainActivity.this, position + "--", Toast.LENGTH_SHORT).show();
}
});
}
}
------------------------------------------------------------------------以上是如何使用----------------------------------------------------------------------------------
以上就是自己定义了一个自动分页的控件，写的不好，希望各位见谅。
时间： 2024-11-05 22:49:22