android 查看图片、保存图片

配置photoview-library-1.2.2.jar 到libs

photoview-library-1.2.2.jar 下载地址 http://pan.baidu.com/s/1nviEKtj

MainActivity

import java.io.BufferedOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.URL;import uk.co.senab.photoview.PhotoView;import android.annotation.SuppressLint;import android.app.Activity;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity implements OnClickListener{    private PhotoView mPhotoView;    private String img;    private Bitmap bitmap;    /**     * 默认文件保存路径     */    private static final String SAVE_PIC_PATH = Environment.getExternalStorageState().equalsIgnoreCase(Environment.MEDIA_MOUNTED)            ? Environment.getExternalStorageDirectory().getAbsolutePath() : "/mnt/sdcard";//保存到SD卡    private static final String SAVE_REAL_PATH = SAVE_PIC_PATH + "/good/savePic";//保存的确切位置    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        init();    }    @SuppressLint("HandlerLeak")    private Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            if (msg.what == 1) {                mPhotoView.setImageBitmap(bitmap);            }        }    };    private void init() {        mPhotoView = (PhotoView) findViewById(R.id.iv_photo);//        img = getIntent().getStringExtra("image");        img = "http://p1.pstatp.com/origin/9e000062f3b52ea52f4";        TextView textView = (TextView)findViewById(R.id.textView1);        textView.setOnClickListener(this);        Log.v("lgq","图片保持。。。。。。。。"+img);        new Thread(runnable).start();    }    Runnable runnable = new Runnable() {        @Override        public void run() {            try {                bitmap = ((BitmapDrawable) loadImageFromUrl(img)).getBitmap();                Message msg = new Message();                msg.what = 1;                handler.sendMessage(msg);            } catch (IOException e) {                e.printStackTrace();            }        }    };    private static Drawable loadImageFromUrl(String url) throws IOException {        URL m = new URL(url);        InputStream i = (InputStream) m.getContent();        return Drawable.createFromStream(i, "src");    }    //保存方法    private void saveFile(Bitmap bm, String fileName) throws IOException {        String subForder = SAVE_REAL_PATH;        File foder = new File(subForder);        if (!foder.exists()) foder.mkdirs();        File myCaptureFile = new File(subForder, fileName);        Log.v("lgq","图片保持。。。。。。。。"+myCaptureFile);        Log.v("lgq","图片保持。。。。。getPath。。。"+myCaptureFile.getPath());        if (!myCaptureFile.exists()) myCaptureFile.createNewFile();        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(myCaptureFile));        bm.compress(Bitmap.CompressFormat.JPEG, 100, bos);        bos.flush();        bos.close();//        Toast.bottomToast("已保存在/good/savePic目录下", PhotoScanActivity.this);        //发送广播通知系统        Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);        Uri uri = Uri.fromFile(myCaptureFile);        intent.setData(uri);        this.sendBroadcast(intent);    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.textView1:                try {                    saveFile(bitmap, System.currentTimeMillis() + ".jpg");                } catch (IOException e) {                    e.printStackTrace();                }                break;            default:                break;        }    }}

添加权限

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

改进版：https://blog.csdn.net/meixi_android/article/details/82801273

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