关键思路:

初始化 组件;

创建并启动拍照intent;

使用回调函数onActivityResult()处理图像。

关键代码:

初始化 组件:

takePicBtn = (Button) findViewById(R.id.buttonPicture);
takePicBtn.setOnClickListener(takePiClickListener); takeVideoBtn = (Button) findViewById(R.id.buttonVideo);
takeVideoBtn.setOnClickListener(takeVideoClickListener);

创建并启动拍照intent:

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);

private final OnClickListener takePiClickListener = new View.OnClickListener()
{ @Override
public void onClick(View v)
{
Log.d(LOG_TAG, "Take Picture Button Click");
//创建新的intent—————— 利用系统自带的相机应用:拍照
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); //创建保存图片的文件—————— create a file to save the image
fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // 此处这句intent的值设置关系到后面的onActivityResult中会进入那个分支,即关系到data是否为null,如果此处指定,则后来的data为null——180行代码
// 设置图片文件的名称——————set the image file name
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); //启动图片捕获intent
startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
} };

使用回调函数onActivityResult()处理图像:

// 如果是拍照
if (CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE == requestCode)
{
Log.d(LOG_TAG, "CAPTURE_IMAGE"); if (RESULT_OK == resultCode)
{ Log.d(LOG_TAG, "RESULT_OK"); if (data != null)
{
// 没有指定特定存储路径的时候
Log.d(LOG_TAG,"data is NOT null, file on default position."); } else
{ Log.d(LOG_TAG, "data IS null, file saved on target position."); // Resize the full image to fit in out image view. // Decode the image file into a Bitmap sized to fill the View Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(), factoryOptions); imageView.setImageBitmap(bitmap);
} }
else if (resultCode == RESULT_CANCELED)
{
// User cancelled the image capture
}
else
{
// Image capture failed, advise user
}
}
05-11 04:30