Android Scheme

在AndroidManifest 新增:

<intent-filter>
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
    <data        android:host="test"        android:scheme="test" />
</intent-filter>

加在你要的activity裡

在你Activity頁面新在下面那段就可接收值

getIntent().getData()   

Android Remove Fragment Page from ViewPager

 參考網址

The ViewPager doesn't remove your fragments with the code above because it loads several views (or fragments in your case) into memory. In addition to the visible view, it also loads the view to either side of the visible one. This provides the smooth scrolling from view to view that makes the ViewPager so cool.

To achieve the effect you want, you need to do a couple of things.

1. Change the FragmentPagerAdapter to a FragmentStatePagerAdapter. The reason for this is that the FragmentPagerAdapter will keep all the views that it loads into memory forever. Where the FragmentStatePagerAdapter disposes of views that fall outside the current and traversable views.

2. Override the adapter method getItemPosition (shown below). When we call mAdapter.notifyDataSetChanged(); the ViewPager interrogates the adapter to determine what has changed in terms of positioning. We use this method to say that everything has changed so reprocess all your view positioning.

And here's the code...



private class MyPagerAdapter extends FragmentStatePagerAdapter {

    //... your existing code

    @Override
    public int getItemPosition(Object object){
        return PagerAdapter.POSITION_NONE;
    }

}

Android Layout getHeight = 0問題解決

在onWindowFocusChanged取得就可以

@Override
 public void onWindowFocusChanged(boolean hasFocus) {
RelativeLayout.getHeight();

}

Android 相機 切換鏡頭

出處:http://stackoverflow.com/questions/16765527/android-switch-camera-when-button-clicked

Button otherCamera = (Button) findViewById(R.id.OtherCamera);

OtherCamera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (inPreview) {
    camera.stopPreview();
}
//NB: if you don't release the current camera before switching, you app will crash
camera.release();

//swap the id of the camera to be used
if(currentCameraId == Camera.CameraInfo.CAMERA_FACING_BACK){
    currentCameraId = Camera.CameraInfo.CAMERA_FACING_FRONT;
}
else {
    currentCameraId = Camera.CameraInfo.CAMERA_FACING_BACK;
}
camera = Camera.open(currentCameraId);

setCameraDisplayOrientation(CameraActivity.this, currentCameraId, camera);
try {

    camera.setPreviewDisplay(previewHolder);
} catch (IOException e) {
    e.printStackTrace();
}
camera.startPreview();
}

If you want to make the camera image show in the same orientation as the display, you can use the following code.

public static void setCameraDisplayOrientation(Activity activity,
         int cameraId, android.hardware.Camera camera) {
     android.hardware.Camera.CameraInfo info =
             new android.hardware.Camera.CameraInfo();
     android.hardware.Camera.getCameraInfo(cameraId, info);
     int rotation = activity.getWindowManager().getDefaultDisplay()
             .getRotation();
     int degrees = 0;
     switch (rotation) {
         case Surface.ROTATION_0: degrees = 0; break;
         case Surface.ROTATION_90: degrees = 90; break;
         case Surface.ROTATION_180: degrees = 180; break;
         case Surface.ROTATION_270: degrees = 270; break;
     }

     int result;
     if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
         result = (info.orientation + degrees) % 360;
         result = (360 - result) % 360;  // compensate the mirror
     } else {  // back-facing
         result = (info.orientation - degrees + 360) % 360;
     }
     camera.setDisplayOrientation(result);
 }

Android 變更Toast位置

Toast toast=Toast.makeText(mActivity,"test", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER, 0, 0);
toast.show();

Android ScrollView + WebView Layout

<ScrollView
        android:id="@+id/my_scroll"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:descendantFocusability="blocksDescendants"
            android:orientation="vertical" >

            <WebView
                android:id="@+id/my_web"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="125dp" >
            </WebView>
        </LinearLayout>
    </ScrollView>

Android Wear 取消往左滑關閉功能

If the user interaction model of your app interferes with the swipe-to-dismiss gesture, you can disable it for your app. To disable the swipe-to-dismiss gesture in your app, extend the default theme and set theandroid:windowSwipeToDismiss attribute to false:

<style name="AppTheme" parent="Theme.DeviceDefault">
    <item name="android:windowSwipeToDismiss">false</item>
</style>