Android拍照Camera（二）

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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    xmlns:android_custom="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <Button        android:id="@+id/btn"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="btn" >    </Button>    <ImageView        android:id="@+id/img"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_below="@+id/btn"        android:scaleType="center" >    </ImageView></RelativeLayout>

public class MainActivity extends Activity implements OnClickListener {private static final int REQUEST_CODE_IMAGE_CATURE = 0x11;private static final int REQUEST_CODE_IMAGE_CATURE_CROP = 0x12;ImageView img;Uri imgUri;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.paomadeng);img = (ImageView) findViewById(R.id.img);Button btn = (Button) findViewById(R.id.btn);btn.setOnClickListener(this);}@Overridepublic void onClick(View v) {if (v.getId() == R.id.btn) {takePicture();}}/** * 拍摄照片并保存 */public void takePicture() {String imgPath = Environment.getExternalStorageDirectory() + File.separator + "tmp.png";File file = new File(imgPath);if (file.exists()) {file.delete();}try {file.createNewFile();} catch (IOException e) {e.printStackTrace();}Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);imgUri = Uri.fromFile(file);intent.putExtra(MediaStore.EXTRA_OUTPUT, imgUri);startActivityForResult(intent, REQUEST_CODE_IMAGE_CATURE);}/** * 裁剪图片 */public void cropPicture() {Intent intent = new Intent("com.android.camera.action.CROP");          intent.setDataAndType(imgUri, "image/*");          intent.putExtra("scale", true);        intent.putExtra("outputX", 300);        intent.putExtra("outputY", 300);        intent.putExtra(MediaStore.EXTRA_OUTPUT, imgUri);          startActivityForResult(intent, REQUEST_CODE_IMAGE_CATURE_CROP);  }@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (resultCode != Activity.RESULT_OK) {return;}if (requestCode == REQUEST_CODE_IMAGE_CATURE) {cropPicture();} else if (requestCode == REQUEST_CODE_IMAGE_CATURE_CROP) {InputStream is = null;try {   // 根据文件Uri，读取输入流is = getContentResolver().openInputStream(imgUri);Bitmap bitmap = BitmapFactory.decodeStream(is);img.setImageBitmap(bitmap);} catch (FileNotFoundException e) {e.printStackTrace();}}}}

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