Android开发 调用照相机实现代码和注意事项

准备工作：设置 调用相机的回调码 和 设置 调用照相机拍照后保存图片的位置，名称，及后缀名（图片类型）

	private int xiangji=3;

private  File sdcardTempFile = new File("/mnt/sdcard/", "tmp_pic_" + SystemClock.currentThreadTimeMillis() + ".jpg");

在button监听器中调用相机：

	//调用系统照相机拍照
		bt4.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				Intent intent=new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);  
				Uri u=Uri.fromFile(sdcardTempFile); 
				intent.putExtra(MediaStore.Images.Media.ORIENTATION, 0); 
				intent.putExtra(MediaStore.EXTRA_OUTPUT, u); 
				intent.putExtra("return-data", true);
				startActivityForResult(intent, xiangji); 

			}
		});

回调函数中接收图片：

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    	 super.onActivityResult(requestCode, resultCode, data); 
    	if (resultCode == RESULT_OK) {
    		System.out.println("requestCode"+requestCode);
    		
    		switch (requestCode){
    		
    		case 2:
    			 Uri tuku_uri = data.getData();
        		 System.out.println(tuku_uri.getPath());
        		   ContentResolver tuku_cr = this.getContentResolver();
        		   try {
    				bmp = BitmapFactory.decodeStream(tuku_cr.openInputStream(tuku_uri));
    					MCShareLaunchShareHelper.shareContentWithBitmap("测试分享本地图片", bmp, "your share url", "", MoxunActivity.this);
    			} catch (FileNotFoundException e) {
    				// TODO Auto-generated catch block
    				e.printStackTrace();
    			}
    			break;
    		case 3:
        		   try {
        			   Uri xiangji_uri = Uri.parse(android.provider.MediaStore.Images.Media.insertImage(getContentResolver(), sdcardTempFile.getAbsolutePath(), null, null)); 
        			   System.out.println(xiangji_uri.getPath());
              		   ContentResolver xiangji_cr = this.getContentResolver();
              		   
              		   bmp = BitmapFactory.decodeStream(xiangji_cr.openInputStream(xiangji_uri));
    					MCShareLaunchShareHelper.shareContentWithBitmap("测试照相机图片", bmp, "your share url", "", MoxunActivity.this);
    			} catch (FileNotFoundException e) {
    				// TODO Auto-generated catch block
    				e.printStackTrace();
    			}
    			break;
    		}
    }

    } 

注意事项：调用相机和调用图库有所不同，就是相机是横屏显示，所以拍照完成后，你的Activity会重绘，这时你的回调函数就接收不到刚才拍到的照片，所以需要在AndroidManifest.xml中配置你的Activiy，禁用重绘

  <!--
      android:screenOrientation="landscape" 横屏
      android:screenOrientation="portrait" 竖屏
      android:configChanges="orientation|keyboardHidden" 旋转屏幕后不重绘Activity
     -->

           <activity
            android:configChanges="orientation|keyboardHidden"
            android:name="MCShareAppActivity"
            android:screenOrientation="portrait" />