Android中拍照Camera的简单实用

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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>    <Button        android:id="@+id/btn2"        android:layout_below="@+id/btn"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="btn2" >    </Button>    <ImageView        android:id="@+id/img"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_below="@+id/btn2" >    </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_SAVE = 0x12;ImageView img;String imgPath;@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);Button btn2 = (Button) findViewById(R.id.btn2);btn.setOnClickListener(this);btn2.setOnClickListener(this);}@Overridepublic void onClick(View v) {if (v.getId() == R.id.btn) {takePicture();} else if (v.getId() == R.id.btn2) {savePicture();}}public void takePicture() {Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);startActivityForResult(intent, REQUEST_CODE_IMAGE_CATURE );}public void savePicture() {// File.pathSeparator换成这个会出现问题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);Uri imgUri = Uri.fromFile(file);intent.putExtra(MediaStore.EXTRA_OUTPUT, imgUri);startActivityForResult(intent, REQUEST_CODE_IMAGE_CATURE_SAVE );}@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) {Bundle bundle = data.getExtras();/** * 获取拍照的数据，注意此时还没有生成相关的图片文件 * 还有就是这里获取的bitmap，其实仅仅是缩略图，并不是原始的数据。 */Bitmap bitmap = bundle.getParcelable("data");img.setImageBitmap(bitmap);} else if (requestCode == REQUEST_CODE_IMAGE_CATURE_SAVE) {try {FileInputStream fis = new FileInputStream(new File(imgPath));// 从文件输入流中获取bitmap对象Bitmap bitmap = BitmapFactory.decodeStream(fis);img.setImageBitmap(bitmap);} catch (FileNotFoundException e) {e.printStackTrace();}}}}

注意：需要加入相关的权限。

    <uses-permission android:name="android.permission.CAMERA"/>    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

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