Android开发之调用系统图库及相机

public class TestActivity extends Activity {

public final static int PHOTO_ZOOM = 0;
public final static int TAKE_PHOTO = 1;
public final static int PHOTO_RESULT = 2;
public static final String IMAGE_UNSPECIFIED = "image/*";
private String imageDir;
private ImageView avatar;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);

avatar = (ImageView) findViewById(R.id.avatar);
// 本地图库选择按钮
LinearLayout upload =
(LinearLayout)findViewById(R.id.local_select_button);
upload.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType(IMAGE_UNSPECIFIED);
Intent wrapperIntent=Intent.createChooser(intent, null);
startActivityForResult(wrapperIntent, PHOTO_ZOOM);
}
});
// 拍照按钮
LinearLayout takePhoto=
(LinearLayout)findViewById(R.id.take_photo_button);
takePhoto.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
imageDir = "temp.jpg";
Intent intent=
new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new 		File(Environment.getExternalStorageDirectory(), imageDir)));
startActivityForResult(intent, TAKE_PHOTO);
}
});
}

// 图片缩放
public void photoZoom(Uri uri) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, IMAGE_UNSPECIFIED);
intent.putExtra("crop", "true");
// aspectX aspectY 是宽高的比例
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// outputX outputY 是裁剪图片宽高
intent.putExtra("outputX", 250);
intent.putExtra("outputY", 250);
intent.putExtra("return-data", true);
startActivityForResult(intent, PHOTO_RESULT);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == PHOTO_ZOOM) {
photoZoom(data.getData());
}
if (requestCode == TAKE_PHOTO) {
File picture = new File(Environment.getExternalStorageDirectory() + "/" + imageDir);
photoZoom(Uri.fromFile(picture));
}

if (requestCode == PHOTO_RESULT) {
Bundle extras = data.getExtras();
if (extras != null) {
Bitmap photo = extras.getParcelable("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);
avatar.setImageBitmap(photo);
}
}
}
super.onActivityResult(requestCode, resultCode, data);
}

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#fcf3ef"
android:gravity="center_horizontal"
android:orientation="vertical"
android:paddingTop="30dp" >

<ImageView
android:id="@+id/avatar"
android:layout_width="130dp"
android:layout_height="130dp"
android:background="@drawable/avatar_frame" />

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:gravity="center_horizontal" >

<LinearLayout
android:id="@+id/local_select_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >

<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/local" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="本地选择"
android:textColor="#000000"
android:textSize="20sp" />
</LinearLayout>

<LinearLayout
android:id="@+id/take_photo_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="50dp"
android:gravity="center"
android:orientation="vertical" >

<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/take_photo" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="拍照"
android:textColor="#000000"
android:textSize="20sp" />
</LinearLayout>
</LinearLayout>
</LinearLayout>