Android获取本地图片并显示

import java.io.ByteArrayOutputStream;  
import java.io.FileNotFoundException;  
import java.io.InputStream;  
  
import android.app.Activity;  
import android.content.ContentResolver;  
import android.content.Intent;  
import android.database.Cursor;  
import android.graphics.Bitmap;  
import android.graphics.BitmapFactory;  
import android.graphics.drawable.BitmapDrawable;  
import android.net.Uri;  
import android.os.Bundle;  
import android.provider.MediaStore;  
import android.util.Base64;  
import android.util.Log;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.widget.ImageView;  
import android.widget.LinearLayout;  
import android.widget.Toast;  
  
public class MainActivity extends Activity {  
    private ImageView iv;  
    private OnClickListener imgViewListener;  
    private Bitmap myBitmap;  
    private int REQUEST_OK = 1;  
    private LinearLayout ly_list;  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
        iv = (ImageView) findViewById(R.id.iv);  
        ly_list=(LinearLayout) findViewById(R.id.ly_list);  
        iv.setOnClickListener(new OnClickListener() {  
  
            @Override  
            public void onClick(View arg0) {  
                // TODO Auto-generated method stub  
                Intent intent = new Intent();    
                //intent = new Intent(Intent.ACTION_GET_CONTENT);  
                /* 开启Pictures画面Type设定为image */    
                intent.setType("image/*");    
                /* 使用Intent.ACTION_GET_CONTENT这个Action */    
                intent.setAction(Intent.ACTION_GET_CONTENT);     
                /* 取得相片后返回本画面 */    
                startActivityForResult(intent, 1);    
  
            }  
        });  
    }  
  
    @Override  
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
        // TODO Auto-generated method stub  
        if (requestCode  == REQUEST_OK) {  
            Uri selectedImage = data.getData();  
            try {  
                Bitmap bitmap = BitmapFactory.decodeStream(this  
                        .getContentResolver().openInputStream(Uri.parse(selectedImage.toString())));  
                iv.setImageBitmap(bitmap);  
                Toast.makeText(getApplicationContext(), "上传成功",  
                        Toast.LENGTH_SHORT).show();  
            } catch (FileNotFoundException e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
            }  
        }  
        super.onActivityResult(requestCode, resultCode, data);  
    }  
  
//  public static Bitmap getPicFromBytes(byte[] bytes,  
//          BitmapFactory.Options opts) {  
//      if (bytes != null)  
//          if (opts != null)  
//              return BitmapFactory.decodeByteArray(bytes, 0, bytes.length,  
//                      opts);  
//          else  
//              return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);  
//      return null;  
//  }  
//  
//  public static byte[] readStream(InputStream in) throws Exception {  
//      byte[] buffer = new byte[1024];  
//      int len = -1;  
//      ByteArrayOutputStream outStream = new ByteArrayOutputStream();  
//  
//      while ((len = in.read(buffer)) != -1) {  
//          outStream.write(buffer, 0, len);  
//      }  
//      byte[] data = outStream.toByteArray();  
//      outStream.close();  
//      in.close();  
//      return data;  
//  }  
  
}  

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