Android读取本地图库与调用摄像头拍摄

//设置返回码：标识本地图库 
  private static final int RESULT_IMAGE=100; 
  //设置MIME码：表示image所有格式的文件均可 
  private static final String IMAGE_TYPE="image/*"; 
  //实例化Intent,传入ACTION_PICK,表示从Item中选取一个数据返回 
  Intent intent=new Intent(Intent.ACTION_PICK,null);  
  //设置Data和Type属性，前者是URI：表示系统图库的URI,后者是MIME码 
  intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,IMAGE_TYPE); 
  //启动这个intent所指向的Activity 
  startActivityForResult(intent,RESULT_IMAGE); 

//设置返回码：标志照相机拍摄 
  private static final int RESULT_CAMERA=200; 
  //设置一个临时路径，保存所拍的照片 
  private static String TEMP_IMAGE_PATH; 
  //获取该路径 
  TEMP_IMAGE_PATH= Environment.getExternalStorageDirectory().getPath()+"/temp.png"; 
  //传入ACTION_IMAGE_CAPTURE:该action指向一个照相机app 
  Intent intent1=new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
  //创建File并获取它的URI值 
  Uri photoUri=Uri.fromFile(new File(TEMP_IMAGE_PATH)); 
  //MediaStore.EXTRA_OUTPUT为字符串"output"，即将该键值对放进intent中 
  intent1.putExtra(MediaStore.EXTRA_OUTPUT,photoUri); 
  startActivityForResult(intent1,RESULT_CAMERA); 

@Override 
  protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 
    if(resultCode==RESULT_OK){ 
      if(requestCode==RESULT_IMAGE&&data!=null){ 
        //相册 
        //通过获取当前应用的contentResolver对象来查询返回的data数据 
        Cursor cursor=this.getContentResolver().query(data.getData(),null,null,null,null); 
        //将cursor指针移动到数据首行 
        cursor.moveToFirst(); 
        //获取字段名为_data的数据 
        String imagePath=cursor.getString(cursor.getColumnIndex("_data")); 
        //设置一个intent 
        Intent intent=new Intent(MainActivity.this,ResultActvity.class); 
        //传入所获取的图片的路径 
        intent.putExtra("mPicPath",imagePath); 
        //销毁cursor对象，释放资源 
        cursor.close(); 
        startActivity(intent); 
      }else if(requestCode==RESULT_CAMERA){ 
        //相机 
        Intent intent=new Intent(MainActivity.this,ResultActvity.class); 
        //由于拍照的时候设置了一个保存路径，所以直接放入该路径 
        intent.putExtra("mPicPath",TEMP_IMAGE_PATH); 
        startActivity(intent); 
      } 
    } 
  } 

public class ResultActvity extends Activity { 
  private ImageView imageView; 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.result); 
    imageView= (ImageView) findViewById(R.id.image); 
    Intent intent=getIntent(); 
    String picPath=intent.getStringExtra("mPicPath"); 
    Bitmap bitmap=BitmapFactory.decodeFile(picPath); 
    imageView.setImageBitmap(bitmap); 
 
  } 
}