Android的Bitmap和BitmapDrawable類解析-android學習之旅（六十）

標籤：android   bitmap   

使用簡單圖片

使用Drawable對象

bitmap和BitmapDrawable對象

package peng.liu.test;import android.app.Activity;import android.content.res.AssetFileDescriptor;import android.content.res.AssetManager;import android.graphics.BitmapFactory;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.ClipDrawable;import android.media.MediaPlayer;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.widget.ImageView;import java.io.InputStream;import java.util.Timer;import java.util.TimerTask;public class MainActivity extends Activity{    String[] images;    ImageView image;    int currentImg;    AssetManager asset;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        image = (ImageView) findViewById(R.id.imageBit);        try{            asset = getAssets();            images = asset.list("");        }catch (Exception e){            e.printStackTrace();        }        findViewById(R.id.btnBit).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                if (currentImg >= images.length){                    currentImg = 0;                }                while (!images[currentImg].endsWith(".png")&&!images[currentImg].endsWith(".jpg")&&!images[currentImg].endsWith(".gif")){                    currentImg++;                    if (currentImg >= images.length){                        currentImg = 0;                    }                    InputStream assetFile = null;                    try{                        assetFile = asset.open(images[currentImg++]);                    }catch (Exception e){                        e.printStackTrace();                    }                    BitmapDrawable drawable = (BitmapDrawable) image.getDrawable();                    if (drawable != null && !drawable.getBitmap().isRecycled()){                        drawable.getBitmap().recycle();                    }                    image.setImageBitmap(BitmapFactory.decodeStream(assetFile));                }            }        });    }}

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Android的Bitmap和BitmapDrawable類解析-android學習之旅（六十）