照相机

public class MainActivity extends Activity implements OnClickListener {

      private Button   bt_camera;

      private ImageView  iv;

      private File file;

      

      @Override

      protected void onCreate(Bundle savedInstanceState) {

             super.onCreate(savedInstanceState);

            setContentView(R.layout. activity_main);

            

             bt_camera=(Button) findViewById(R.id. bt_camera);

             iv=(ImageView) findViewById(R.id. iv);

            

             //注册拍照按钮的监听事件

             bt_camera.setOnClickListener( this);

            

      }

      /**

       * 拍照按钮点击的时候调用的方法

       */

      @Override

      public void onClick(View v) {

            

             // create Intent to take a picture and return control to the calling application   

            Intent intent = new Intent(MediaStore. ACTION_IMAGE_CAPTURE);   

            

             file = new File(Environment.getExternalStorageDirectory(),System. currentTimeMillis()+".jpg");

            

            intent.putExtra(MediaStore. EXTRA_OUTPUT, file); // set the image file name   

             // start the image capture Intent   

            startActivityForResult(intent, 0);

      

      }

      

      

      /**

       * 数据回显

       */

      protected void onActivityResult( int requestCode, int resultCode, Intent data) {   

            

          if(data!= null){

             Bitmap bitmap=data.getParcelableExtra( "data");  //得到照片位图

             iv.setImageBitmap(bitmap);

          }

            

      

      

            

      }

}