Android|Android 实现按钮从两边移到中间动画效果 Android实现按钮从两边移到中间

【Android|Android 实现按钮从两边移到中间动画效果】Android 实现按钮从两边移到中间动画效果
http://blog.csdn.net/aminfo/article/details/7589149

package org.shuxiang.test; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Looper; import android.os.Message; import android.util.DisplayMetrics; import android.util.Log; import android.view.Gravity; import android.widget.Button; import android.widget.LinearLayout; import android.widget.LinearLayout.LayoutParams; public class MainActivity extends Activity { private DisplayMetrics dm; private LinearLayout layout, layoutLeft, layoutCenter, layoutRight; private static Handler messageHandler; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); dm = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(dm); layout = new LinearLayout(this); layout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); layout.setOrientation(0); //水平 layout.setGravity(Gravity.CENTER); layoutLeft = new LinearLayout(this); layoutLeft.setLayoutParams(new LayoutParams(0, LayoutParams.WRAP_CONTENT)); layoutLeft.setGravity(Gravity.RIGHT); layoutCenter = new LinearLayout(this); layoutCenter.setLayoutParams(new LayoutParams(dm.widthPixels, LayoutParams.WRAP_CONTENT)); layoutRight = new LinearLayout(this); layoutRight.setLayoutParams(new LayoutParams(0, LayoutParams.WRAP_CONTENT)); layoutRight.setGravity(Gravity.LEFT); Button btA = new Button(this); btA.setText("按钮A"); btA.setSingleLine(true); Button btB = new Button(this); btB.setText("按钮B"); btB.setSingleLine(true); layoutLeft.addView(btA); layoutRight.addView(btB); layout.addView(layoutLeft); layout.addView(layoutCenter); layout.addView(layoutRight); setContentView(layout); Looper looper = Looper.myLooper(); messageHandler = new MessageHandler(looper); new Thread(new Runnable() { @Override public void run() { int speed = 5; //每次移动间隔毫秒，数字越大越慢 int speedPx = 1; //每次移动间隔像素，数字越大越快 int loopCount = dm.widthPixels/2; int i=1; while(i < loopCount) { Message message = Message.obtain(); message.what = 1; message.arg1 = i; messageHandler.sendMessage(message); i = i + speedPx; synchronized(this) { try { wait(speed); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }i=0; while(i < 10) { Message message = Message.obtain(); message.what = 1; message.arg1 = loopCount - i; messageHandler.sendMessage(message); i = i + speedPx; synchronized(this) { try { wait(speed); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } }).start(); }class MessageHandler extends Handler { public MessageHandler(Looper looper) { super(looper); } @Override public void handleMessage(Message msg) { switch (msg.what) { case 1: layoutLeft.setLayoutParams(new LayoutParams(msg.arg1, LayoutParams.WRAP_CONTENT)); layoutRight.setLayoutParams(new LayoutParams(msg.arg1, LayoutParams.WRAP_CONTENT)); layoutCenter.setLayoutParams(new LayoutParams(dm.widthPixels - msg.arg1 * 2, LayoutParams.WRAP_CONTENT)); break; } } } }

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