Example usage for android.view KeyEvent KEYCODE

Introduction

In this page you can find the example usage for android.view KeyEvent KEYCODE_BACK.

Prototype

int KEYCODE_BACK

To view the source code for android.view KeyEvent KEYCODE_BACK.

Click Source Link

Document

Key code constant: Back key.

Usage

From source file:Main.java

public static boolean canUseKey(int keyCode) {
    return ((keyCode != KeyEvent.KEYCODE_BACK) && (keyCode != KeyEvent.KEYCODE_HOME)
            && (keyCode != KeyEvent.KEYCODE_MENU) && (keyCode != KeyEvent.KEYCODE_ENDCALL));
}

From source file:Main.java

public static void shutdownActivity() {
    Runtime runtime = Runtime.getRuntime();
    try {/*from w w  w . ja  v a 2s  .  c  o m*/
        runtime.exec("input keyevent " + KeyEvent.KEYCODE_BACK);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

From source file:Main.java

public static int getNavigationBarHeight(Context c) {
    int result = 0;
    boolean hasMenuKey = ViewConfiguration.get(c).hasPermanentMenuKey();
    boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);

    if (!hasMenuKey && !hasBackKey) {
        //The device has a navigation bar
        Resources resources = c.getResources();

        int orientation = resources.getConfiguration().orientation;
        int resourceId;
        if (isTablet(c)) {
            resourceId = resources//from w ww .  j a  v  a  2  s .  co  m
                    .getIdentifier(orientation == Configuration.ORIENTATION_PORTRAIT ? "navigation_bar_height"
                            : "navigation_bar_height_landscape", "dimen", "android");
        } else {
            resourceId = resources
                    .getIdentifier(orientation == Configuration.ORIENTATION_PORTRAIT ? "navigation_bar_height"
                            : "navigation_bar_width", "dimen", "android");
        }

        if (resourceId > 0) {
            return resources.getDimensionPixelSize(resourceId);
        }
    }
    return result;
}

From source file:Main.java

public static int getNavigationBarHeight(Context context) {
    int navigationBarHeight = 0;
    boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);
    boolean hasHomeKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_HOME);
    if (!hasBackKey && !hasHomeKey) {
        // 99% sure there is a navigation bar
        Resources resources = context.getResources();
        int resourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
        if (resourceId > 0) {
            navigationBarHeight = resources.getDimensionPixelSize(resourceId);
        }//from   w  w  w . j a  v a 2 s  .  c o  m
    }
    return navigationBarHeight;
}

From source file:Main.java

public static boolean checkDeviceHasNavigationBar(Context context) {
    boolean hasMenuKey = ViewConfiguration.get(context).hasPermanentMenuKey();
    boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);

    if (!hasMenuKey && !hasBackKey) {
        return true;
    }//w w  w .j ava  2 s. c o m
    return false;
}

From source file:Main.java

private static int getNavBarHeight(Context context) {
    boolean hasMenuKey = Build.VERSION.SDK_INT >= 14 && ViewConfiguration.get(context).hasPermanentMenuKey();
    boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);
    boolean hasNavBar = !hasMenuKey && !hasBackKey;

    if (hasNavBar) {
        boolean isPortrait = context.getResources()
                .getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT;

        boolean isTablet = (context.getResources().getConfiguration().screenLayout
                & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_LARGE;

        String key = isPortrait ? "navigation_bar_height"
                : (isTablet ? "navigation_bar_height_landscape" : null);

        return key == null ? 0 : getDimenSize(context, key);
    } else {//w  w w  . j  a va2 s  . c o m
        return 0;
    }
}

From source file:Main.java

public static boolean onKeyBackGoHome(Activity activity, int keyCode, KeyEvent event) {
    if (!(keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0)) {
        return false; // continue
    }/* ww  w . j a va2  s . co m*/

    activity.startActivity(new Intent().setAction(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME));
    return true;
}

From source file:Main.java

/**
 * Check the device whether has soft navigation bar
 *///from w ww .ja v a 2 s  . c  om
public static boolean hasNavigationBar(Context context) {
    Resources resources = context.getResources();
    int id = resources.getIdentifier("config_showNavigationBar", "bool", "android");
    if (id > 0) {
        return resources.getBoolean(id);
    } else { // Check for keys
        boolean hasMenuKey = ViewConfiguration.get(context).hasPermanentMenuKey();
        boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);
        return !hasMenuKey && !hasBackKey;
    }
}

From source file:com.farmerbb.taskbar.widget.StartMenuLayout.java

@Override
public boolean dispatchKeyEvent(KeyEvent event) {
    if (viewHandlesBackButton && event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
        LocalBroadcastManager.getInstance(getContext())
                .sendBroadcast(new Intent("com.farmerbb.taskbar.HIDE_START_MENU"));
        return true;
    }//from   w w w . j  av  a2s. c o  m

    return super.dispatchKeyEvent(event);
}

From source file:com.app.khclub.base.easeim.activity.BaseActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
        finish();/*from w  w  w .ja  v  a2  s .  c o  m*/
        overridePendingTransition(R.anim.push_left_in, R.anim.push_left_out);
        return true;
    } else
        return super.onKeyDown(keyCode, event);
}

Example usage for android.view KeyEvent KEYCODE_BACK

Introduction

Prototype

Document

Usage