android: 获取屏幕高度和虚拟导航栏高度的几种方法

package com.yongdaimi.android.androidapitest;

import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Point;
import android.graphics.Rect;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Display;
import android.view.Window;
import android.view.WindowManager;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        testCode();
    }
    
    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        Log.i("xp.chen", "getContentViewHeight():  "+getContentViewHeight(MainActivity.this));
        Log.i("xp.chen", "getStatusBarHeight2():  "+getStatusBarHeight2(this));
    }

    private void testCode() {
        Log.i("xp.chen", "getResources().getDisplayMetrics():: widthPixels: "+getScreenWidth(this));
        Log.i("xp.chen", "getResources().getDisplayMetrics():: heightPixels: "+getScreenHeight(this));
        Log.i("xp.chen", "WindowManager:: widthPixels: "+getScreenWidth2(this));
        Log.i("xp.chen", "WindowManager:: heightPixels: "+getScreenHeight2(this));
        Log.i("xp.chen", "WindowManager getRealSize() :: widthPixels: "+getScreenWidth3(this));
        Log.i("xp.chen", "WindowManager getRealSize() :: heightPixels: "+getScreenHeight3(this));
        Log.i("xp.chen", "getResources() navigation_bar_height:  "+getNavigationBarHeight(this));
        Log.i("xp.chen", "getResources() getStatusBarHeight:  "+getStatusBarHeight(this));
    }


    public static int getScreenWidth(Context context) {
        return context.getResources().getDisplayMetrics().widthPixels;
    }

    /**
     * 不包含虚拟导航栏高度
     * @param context
     * @return
     */
    public static int getScreenHeight(Context context) {
        return context.getResources().getDisplayMetrics().heightPixels;
    }

    public static int getScreenWidth2(Context context) {
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics dm = new DisplayMetrics();
        wm.getDefaultDisplay().getMetrics(dm);
        return dm.widthPixels;
    }

    public static int getScreenHeight2(Context context) {
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics dm = new DisplayMetrics();
        wm.getDefaultDisplay().getMetrics(dm);
        return dm.heightPixels;
    }

    /**
     * 包含虚拟导航栏高度
     * @param context
     * @return
     */
    public static int getScreenWidth3(Context context) {
        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        Display defaultDisplay = windowManager.getDefaultDisplay();
        Point outPoint = new Point();
        defaultDisplay.getRealSize(outPoint);
        return outPoint.x;
    }

    public static int getScreenHeight3(Context context) {
        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        Display defaultDisplay = windowManager.getDefaultDisplay();
        Point outPoint = new Point();
        defaultDisplay.getRealSize(outPoint);
        return outPoint.y;
    }

    public static int getNavigationBarHeight(Context context) {
        int navigationBarHeight = -1;
        Resources resources = context.getResources();
        int resourceId = resources.getIdentifier("navigation_bar_height","dimen", "android");
        if (resourceId > 0) {
            navigationBarHeight = resources.getDimensionPixelSize(resourceId);
        }
        return navigationBarHeight;
    }

    public int getStatusBarHeight(Context context) {
        int result = 0;
        int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            result = getResources().getDimensionPixelSize(resourceId);
        }
        return result;
    }

    /**
     *  注意：这个方法的值必须等到页面创建完成后才能获取到。推荐写在onWindowFocusChanged（）方法中
     * @param activity
     * @return
     */
    public int getStatusBarHeight2(Activity activity) {
        Rect rectangle = new Rect();
        getWindow().getDecorView().getWindowVisibleDisplayFrame(rectangle);
        return rectangle.top;
    }

    /**
     *  注意：这个方法的值必须等到页面创建完成后才能获取到。推荐写在onWindowFocusChanged（）方法中
     * @param activity
     * @return
     */
    public static int getContentViewHeight(Activity activity) {
        Rect rectangle= new Rect();
        activity.getWindow().findViewById(Window.ID_ANDROID_CONTENT).getDrawingRect(rectangle);
        return rectangle.height();
    }

    /**
     *  可以利用getScreenHeight() 与 getScreenHeight3() 返回值的差异来判断是否存在虚拟导航栏
     * @param context
     * @return
     */
    public static boolean hasNavigationBar(Context context) {
        return getScreenHeight(context) != getScreenHeight3(context);
    }


}

测试结果：

【三星S6 无虚拟导航栏】

2019-05-07 15:58:08.157 11483-11483/com.yongdaimi.android.androidapitest I/xp.chen: getResources().getDisplayMetrics():: widthPixels: 1440
2019-05-07 15:58:08.157 11483-11483/com.yongdaimi.android.androidapitest I/xp.chen: getResources().getDisplayMetrics():: heightPixels: 2560
2019-05-07 15:58:08.157 11483-11483/com.yongdaimi.android.androidapitest I/xp.chen: WindowManager:: widthPixels: 1440
2019-05-07 15:58:08.158 11483-11483/com.yongdaimi.android.androidapitest I/xp.chen: WindowManager:: heightPixels: 2560
2019-05-07 15:58:08.158 11483-11483/com.yongdaimi.android.androidapitest I/xp.chen: WindowManager getRealSize() :: widthPixels: 1440
2019-05-07 15:58:08.158 11483-11483/com.yongdaimi.android.androidapitest I/xp.chen: WindowManager getRealSize() :: heightPixels: 2560
2019-05-07 15:58:08.159 11483-11483/com.yongdaimi.android.androidapitest I/xp.chen: getResources() navigation_bar_height: 192
2019-05-07 15:58:08.159 11483-11483/com.yongdaimi.android.androidapitest I/xp.chen: getResources() getStatusBarHeight: 96
2019-05-07 15:58:08.224 11483-11483/com.yongdaimi.android.androidapitest I/xp.chen: getContentViewHeight(): 2240
2019-05-07 15:58:08.225 11483-11483/com.yongdaimi.android.androidapitest I/xp.chen: getStatusBarHeight2(): 96

【Google Nexus6 带虚拟导航栏】

2019-05-07 15:59:02.894 30818-30818/com.yongdaimi.android.androidapitest I/xp.chen: getResources().getDisplayMetrics():: widthPixels: 1440
2019-05-07 15:59:02.894 30818-30818/com.yongdaimi.android.androidapitest I/xp.chen: getResources().getDisplayMetrics():: heightPixels: 2392
2019-05-07 15:59:02.895 30818-30818/com.yongdaimi.android.androidapitest I/xp.chen: WindowManager:: widthPixels: 1440
2019-05-07 15:59:02.895 30818-30818/com.yongdaimi.android.androidapitest I/xp.chen: WindowManager:: heightPixels: 2392
2019-05-07 15:59:02.895 30818-30818/com.yongdaimi.android.androidapitest I/xp.chen: WindowManager getRealSize() :: widthPixels: 1440
2019-05-07 15:59:02.896 30818-30818/com.yongdaimi.android.androidapitest I/xp.chen: WindowManager getRealSize() :: heightPixels: 2560
2019-05-07 15:59:02.896 30818-30818/com.yongdaimi.android.androidapitest I/xp.chen: getResources() navigation_bar_height: 168
2019-05-07 15:59:02.896 30818-30818/com.yongdaimi.android.androidapitest I/xp.chen: getResources() getStatusBarHeight: 84
2019-05-07 15:59:02.967 30818-30818/com.yongdaimi.android.androidapitest I/xp.chen: getContentViewHeight(): 2112
2019-05-07 15:59:02.968 30818-30818/com.yongdaimi.android.androidapitest I/xp.chen: getStatusBarHeight2(): 84

参考链接：

1.Android屏幕各尺寸获取