Android布局變化時動畫效果的現實(二)

MainActivity如下:

package wy.test;import android.animation.AnimatorInflater;import android.animation.LayoutTransition;import android.animation.ObjectAnimator;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.LinearLayout;import android.widget.TextView;/** * Demo描述: * 布局變化時動畫效果的現實(二) * 當布局發生變化時展示一個動畫,不至於轉場效果太生硬. * 當然類似的還可以設定布局變化的不同時刻的動畫,一共有四種: * LayoutTransition.APPEARING,LayoutTransition.CHANGE_APPEARING, * LayoutTransition.CHANGE_DISAPPEARING,LayoutTransition.DISAPPEARING *  *  * 參考資料: * 1 http://blog.csdn.net/alrdy/article/details/7836963 * 2 http://www.cnblogs.com/mengdd/p/3305973.html * 3 http://blog.csdn.net/think_soft/article/details/12417107 *  *   Thank you very much */public class TestAnimateLayoutChangesActivity extends Activity {private LinearLayout mRootLinearLayout;private Context mContext;private TextView mTextView;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        init();    }    private void init(){    mContext=this;    mRootLinearLayout=(LinearLayout) findViewById(R.id.rootLinearLayout);    mTextView=(TextView) findViewById(R.id.textView);    mTextView.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Button addedButton=new Button(mContext);addedButton.setText("Button");//屬性動畫ObjectAnimatorObjectAnimator objectAnimator=(ObjectAnimator)AnimatorInflater.loadAnimator(mContext, R.animator.scalexanimator); objectAnimator.setTarget(addedButton);LayoutTransition layoutTransition=new LayoutTransition();//指定為新加View出現時展示動畫    layoutTransition.setAnimator(LayoutTransition.APPEARING, objectAnimator);    //為布局添加LayoutTransition    mRootLinearLayout.setLayoutTransition(layoutTransition);mRootLinearLayout.addView(addedButton);}});    }}

main.xml如下:

scalexanimator.xml如下: