动态移动ImageView的位置

2014-09-06 02:51:25 422 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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我有个一个ImageView不断播放动画，现在能实现用TranslationAnimation实现ImageView的移动效果。但是拖完以后ImageView又回到原来的位置。我希望我鼠标拖动到哪ImageView就在哪个位置。这该如何实现。试了setPadding,setMargins都不奏效。

package com.example.animationdrawable;



import android.annotation.SuppressLint;

import android.app.Activity;

import android.graphics.drawable.AnimationDrawable;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.util.DisplayMetrics;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnTouchListener;

import android.view.animation.TranslateAnimation;

import android.widget.AbsoluteLayout;

import android.widget.ImageView;

import android.widget.RelativeLayout;



public class MainActivity extends Activity {

	private ImageView imgView;

	private float curX=0;

	private float curY=0;

	float nextX=0;

	float nextY=0;

	int width;

	int height;//屏幕的高度

	boolean isstart=false;

	RelativeLayout.LayoutParams params;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		DisplayMetrics dm=new DisplayMetrics();

		getWindowManager().getDefaultDisplay().getMetrics(dm);

		width=dm.widthPixels;

		height=dm.heightPixels;

		imgView=(ImageView)findViewById(R.id.anim);



		curX=(width-60)/2;

		curY=height-60*2;

		

		

		final AnimationDrawable animation=(AnimationDrawable)imgView.getBackground();

		final Handler handler =new Handler(){

			public void handleMessage(Message msg){

				

				if(msg.what==0x123){

					float moveX=nextX-curX;

					float moveY=nextY-curY;

					

					

					TranslateAnimation anim=new TranslateAnimation(curX,nextX-imgView.getWidth()/2,curY,nextY-imgView.getHeight()/2);

					curX=nextX;

					curY=nextY;

					anim.setDuration(200);

					imgView.startAnimation(anim);

					

				}

				if(msg.what==0x111){

					params=(RelativeLayout.LayoutParams)imgView.getLayoutParams();

					params.setMargins(Math.round(nextX), Math.round(nextY)

							, Math.round(width-60-nextX), Math.round(height-60-nextY));

				}

			}

		};

		

		imgView.setOnTouchListener(new OnTouchListener() {

			

			@Override

			public boolean onTouch(View v, MotionEvent event) {

				// TODO Auto-generated method stub

				if(!isstart)

					animation.start();

				switch(event.getActionMasked()){

				case MotionEvent.ACTION_MOVE:

					nextX=event.getX();//获得当前的X坐标

					nextY=event.getY();//获得当前的Y坐标

					handler.sendEmptyMessageDelayed(0x123, 200);

					break;

				case MotionEvent.ACTION_UP:

					handler.sendEmptyMessage(0x111);

					break;

				}

				return true;

			}

		});

		

	}



}