Getting orientation of Android device

问题

You would think that there would be a straight forward solution. The Android docs state:

The orientation sensor was deprecated in Android 2.2 (API level 8). Instead of using raw data from the orientation sensor, we recommend that you use the getRotationMatrix() method in conjunction with the getOrientation() method to compute orientation values.

Yet, they don't provide a solution on how to implement getOrientation() and getRotationMatrix(). I've spent several hours reading through posts here on developers using these methods but they all have partially pasted code or some weird implementation. Googling hasn't provided a tutorial. Can someone please paste a simple solution using these two methods to generate the orientation??

回答1:

Here is the implementation for getOrientation():

public int getscrOrientation()
    {
        Display getOrient = getWindowManager().getDefaultDisplay();

        int orientation = getOrient.getOrientation();

        // Sometimes you may get undefined orientation Value is 0
        // simple logic solves the problem compare the screen
        // X,Y Co-ordinates and determine the Orientation in such cases
        if(orientation==Configuration.ORIENTATION_UNDEFINED){

            Configuration config = getResources().getConfiguration();
            orientation = config.orientation;

            if(orientation==Configuration.ORIENTATION_UNDEFINED){
                //if height and widht of screen are equal then
                // it is square orientation
                if(getOrient.getWidth()==getOrient.getHeight()){
                    orientation = Configuration.ORIENTATION_SQUARE;
                }else{ //if widht is less than height than it is portrait
                    if(getOrient.getWidth() < getOrient.getHeight()){
                        orientation = Configuration.ORIENTATION_PORTRAIT;
                    }else{ // if it is not any of the above it will definitely be landscape
                        orientation = Configuration.ORIENTATION_LANDSCAPE;
                    }
                }
            }
        }
        return orientation; // return value 1 is portrait and 2 is Landscape Mode
    }

And you can also refer this example which represent the use of both the methods:

     getOrientation and getRotationMatrix

http://www.codingforandroid.com/2011/01/using-orientation-sensors-simple.html

回答2:

 public int getScreenOrientation() {


// Query what the orientation currently really is.
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT)                {
    return 1; // Portrait Mode

}else if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
    return 2;   // Landscape mode
}
return 0;
}

回答3:

protected void onResume() {
    // change the screen orientation
    if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
        setContentView(R.layout.portrait);
    } else if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
        setContentView(R.layout.landscape);
    } else {
        setContentView(R.layout.oops);
    }
}

来源：https://stackoverflow.com/questions/14955728/getting-orientation-of-android-device

标签

android

orientation