Android 上下滚动TextSwitcher实例详解
1.在activity中需要代码声明
textSwitcher = (TextSwitcher)findViewById(R.id.text_switcher); textSwitcher.setFactory(new ViewFactory() { @Override public View makeView() { TextView tv = new TextView(MainActivity.this); tv.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 16.0F); tv.setTextColor(Color.RED); return tv; } }); textSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.anim_in)); textSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.anim_out));
2.两个anim动画xml
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android" android:fillAfter="true" android:shareInterpolator="false" android:zAdjustment="top"> <translate android:duration="3000" android:fromYDelta="100%p" android:toYDelta="0" /> </set> <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android" android:fillAfter="true" android:shareInterpolator="false" android:zAdjustment="top"> <translate android:duration="3000" android:fromYDelta="0" android:toYDelta="-100%p" /> </set> <style name="pop_anim"> <item name="android:windowEnterAnimation">@anim/anim_in</item> <item name="android:windowExitAnimation">@anim/anim_out</item> </style>
3.用线程或者定时器实现循环翻动。
Thread t = new Thread(new Runnable() { @Override public void run() { while (!flag) { Message msg = new Message(); msg.what = 1; msg.obj = getItem[i]; handler.sendMessage(msg); if (i== 2) { i = 0; } try { t.sleep(3000); i++; } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
4.hanlder更新ui
private Handler handler = new Handler(){ public void handleMessage(android.os.Message msg) { textSwitcher.setText((String)msg.obj); super.handleMessage(msg); }; };
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