Android-沉浸式的实现

1、在res中创建目录values-v21并创建styles.xml文件

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2、在styles.xml文件中加入控制

3、创建BaseActivity

public class BaseActivity extends FragmentActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        StatusBarUtil.statusBarLightMode(this);
    }
}

4、创建StatusBarUtil

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Build;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

/**
 * @author renzhiqiang
 * @date 2019/4/24
 */
public class StatusBarUtil {
  /**
   * 修改状态栏为全透明
   */
  public static void transparencyBar(Activity activity) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
      Window window = activity.getWindow();
      window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
      window.getDecorView()
          .setSystemUiVisibility(
              View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
      window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
      window.setStatusBarColor(Color.TRANSPARENT);
    } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
      Window window = activity.getWindow();
      window.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS,
          WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
    }
  }

  /**
   * 状态栏亮色模式，设置状态栏黑色文字、图标，
   * 适配4.4以上版本MIUIV、Flyme和6.0以上版本其他Android
   *
   * @return 1:MIUUI 2:Flyme 3:android6.0
   */
  public static void statusBarLightMode(Activity activity) {
    int result = 0;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
      if (miuiSetStatusBarLightMode(activity, true)) {
        result = 1;
      } else if (flymeSetStatusBarLightMode(activity.getWindow(), true)) {
        result = 2;
      } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        activity.getWindow()
            .getDecorView()
            .setSystemUiVisibility(
                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
        result = 3;
      }
    }
  }

  /**
   * 已知系统类型时，设置状态栏黑色文字、图标。
   * 适配4.4以上版本MIUIV、Flyme和6.0以上版本其他Android
   *
   * @param type 1:MIUUI 2:Flyme 3:android6.0
   */
  public static void statusBarLightMode(Activity activity, int type) {
    if (type == 1) {
      miuiSetStatusBarLightMode(activity, true);
    } else if (type == 2) {
      flymeSetStatusBarLightMode(activity.getWindow(), true);
    } else if (type == 3) {
      activity.getWindow()
          .getDecorView()
          .setSystemUiVisibility(
              View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
    }
  }

  /**
   * 状态栏暗色模式，清除MIUI、flyme或6.0以上版本状态栏黑色文字、图标
   */
  public static void StatusBarDarkMode(Activity activity, int type) {
    if (type == 1) {
      miuiSetStatusBarLightMode(activity, false);
    } else if (type == 2) {
      flymeSetStatusBarLightMode(activity.getWindow(), false);
    } else if (type == 3) {
      activity.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
    }
  }

  /**
   * 设置状态栏图标为深色和魅族特定的文字风格
   * 可以用来判断是否为Flyme用户
   *
   * @param window 需要设置的窗口
   * @param dark 是否把状态栏文字及图标颜色设置为深色
   * @return boolean 成功执行返回true
   */
  public static boolean flymeSetStatusBarLightMode(Window window, boolean dark) {
    boolean result = false;
    if (window != null) {
      try {
        WindowManager.LayoutParams lp = window.getAttributes();
        Field darkFlag =
            WindowManager.LayoutParams.class.getDeclaredField("MEIZU_FLAG_DARK_STATUS_BAR_ICON");
        Field meizuFlags = WindowManager.LayoutParams.class.getDeclaredField("meizuFlags");
        darkFlag.setAccessible(true);
        meizuFlags.setAccessible(true);
        int bit = darkFlag.getInt(null);
        int value = meizuFlags.getInt(lp);
        if (dark) {
          value |= bit;
        } else {
          value &= ~bit;
        }
        meizuFlags.setInt(lp, value);
        window.setAttributes(lp);
        result = true;
      } catch (Exception e) {

      }
    }
    return result;
  }

  /**
   * 需要MIUIV6以上
   *
   * @param dark 是否把状态栏文字及图标颜色设置为深色
   * @return boolean 成功执行返回true
   */
  public static boolean miuiSetStatusBarLightMode(Activity activity, boolean dark) {
    boolean result = false;
    Window window = activity.getWindow();
    if (window != null) {
      Class clazz = window.getClass();
      try {
        int darkModeFlag;
        Class layoutParams = Class.forName("android.view.MiuiWindowManager$LayoutParams");
        Field field = layoutParams.getField("EXTRA_FLAG_STATUS_BAR_DARK_MODE");
        darkModeFlag = field.getInt(layoutParams);
        //noinspection unchecked
        Method extraFlagField = clazz.getMethod("setExtraFlags", int.class, int.class);
        if (dark) {
          //状态栏透明且黑色字体
          extraFlagField.invoke(window, darkModeFlag, darkModeFlag);
        } else {
          //清除黑色字体
          extraFlagField.invoke(window, 0, darkModeFlag);
        }
        result = true;

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
          //开发版 7.7.13 及以后版本采用了系统API，旧方法无效但不会报错，所以两个方式都要加上
          if (dark) {
            activity.getWindow()
                .getDecorView()
                .setSystemUiVisibility(
                    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
          } else {
            activity.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
          }
        }
      } catch (Exception e) {

      }
    }
    return result;
  }

  //获取屏幕虚拟键高度
  public static int getVirtualBarHeight(Context context) {
    int vh = 0;
    WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    Display display = windowManager.getDefaultDisplay();
    DisplayMetrics dm = new DisplayMetrics();
    try {
      @SuppressWarnings("rawtypes") Class c = Class.forName("android.view.Display");
      @SuppressWarnings("unchecked") Method method =
          c.getMethod("getRealMetrics", DisplayMetrics.class);
      method.invoke(display, dm);
      vh = dm.heightPixels - display.getHeight();
    } catch (Exception e) {
      e.printStackTrace();
    }
    return vh;
  }

  public static int getStatusBarHeight(Context context) {
    int height = 0;
    try {
      Class c = Class.forName("com.android.internal.R$dimen");
      Field f = c.getField("status_bar_height");
      int id = (int) f.get(null);
      height = context.getResources().getDimensionPixelSize(id);
    } catch (Exception e) {
    }
    return height;
  }

  public static int dip2px(Context context, float dpValue) {
    final float scale = context.getResources().getDisplayMetrics().density;
    return (int) (dpValue * scale + 0.5f);
  }

  public static int px2dip(Context context, float pxValue) {
    final float scale = context.getResources().getDisplayMetrics().density;
    return (int) (pxValue / scale + 0.5f);
  }

  /** 获取手机的密度 */
  public static float getDensity(Context context) {
    DisplayMetrics dm = context.getResources().getDisplayMetrics();
    return dm.density;
  }
}