实现两张图片渐隐渐现的过渡效果Transition Drawable实现两张图片之间动态过度效果的方式。
运行如下所示:第一张为初始界面,第二张为过度中界面,第三张为过渡结束
新建一个TransitionDrawable的Android工程。
目录结构:
主界面activity_main.xml代码如下:
<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"> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/button_text" android:layout_centerInParent="true" android:onClick="change" android:background="@drawable/transition" android:layout_marginBottom="20dp"/> </RelativeLayout>
主界面主要是一个应用了TransitionDrawable的按钮
transition是在drawalbe文件夹下,其代码如下所示:
<?xml version="1.0" encoding="utf-8"?> <transition xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@color/red"></item> <item android:drawable="@color/green"></item> </transition>
strings.xml代码如下:
<string name="app_name">TransitionDrawable</string> <string name="hello_world">Hello world!</string> <string name="action_settings">Settings</string> <string name="button_text">过渡效果</string>
colors.xml代码如下:
<?xml version="1.0" encoding="utf-8"?> <resources> <color name="red">#ff0000</color> <color name="green">#00ff00</color> </resources>
MainActivity.java代码如下
package com.shen.transitiondrawable; import android.app.Activity; import android.graphics.drawable.TransitionDrawable; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } public void change(View v) { TransitionDrawable drawable = (TransitionDrawable)((Button)v).getBackground(); drawable.startTransition(2000); } }
扩展阅读:
http://www.tuicool.com/articles/uiaYBrU
http://adk.tumblr.com/post/13069401302/outofmemoryerror-imageview-and-transitiondrawable
时间: 2024-10-13 11:22:40