Android TransitionDrawable ImageView over-performance instance

Android TransitionDrawable ImageView over-performance instance
 

Achieve the Transition effect Transition Drawable of the two images to achieve the dynamic excessive effect between the two images.

Run the following command: the first is the initial interface, the second is the excessive interface, and the third is the end of the transition.

Create a TransitionDrawable Android project.
Directory structure:

The main interface activity_main.xml code is as follows:
 

The main interface is a button that applies TransitionDrawable.
Transition is in the drawalbe folder, and its code is as follows:

 

 

The strings. xml Code is as follows:

 

 

 
 
  
TransitionDrawable
     
 
  
Hello world!
     
 
  
Settings
     
 
  
Transition Effect
 

The colors. xml Code is as follows:

 

 

 
   
  
   #ff0000
    
  
   #00ff00
    
 

The MainActivity. java code is as follows:

 

 

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 {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}@Overridepublic 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;}@Overridepublic 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);}}