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。

执行例如以下所看到的: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

Android TransitionDrawable ImageView过度效果使用实例_bundle   Android TransitionDrawable ImageView过度效果使用实例_过渡效果_02     Android TransitionDrawable ImageView过度效果使用实例_xml_03

新建一个TransitionDrawable的Androidproject。

文件夹结构:

Android TransitionDrawable ImageView过度效果使用实例_ide_04


主界面activity_main.xml代码例如以下:


<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button

transition是在drawalbe目录下,其代码例如以下所看到的:

<?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代码例如以下:

<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代码例如以下:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="red">#ff0000</color>
<color name="green">#00ff00</color>
</resources>


MainActivity.java代码例如以下

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);
}
}