一手遮天 Android - UI: 状态栏(statusBar)

项目地址 https://github.com/webabcd/AndroidDemo
作者 webabcd

一手遮天 Android - UI: 状态栏(statusBar)

示例如下:

/ui/StatusBarDemo1.java

/**
 * 演示状态栏的相关操作
 */

package com.webabcd.androiddemo.ui;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.Toast;

import com.webabcd.androiddemo.R;
import com.webabcd.androiddemo.utils.Helper;

import java.util.Locale;

public class StatusBarDemo1 extends AppCompatActivity {

    private Button mButton1;
    private Button mButton2;
    private Button mButton3;
    private Button mButton4;
    private Button mButton5;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ui_statusbardemo1);

        mButton1 = findViewById(R.id.button1);
        mButton2 = findViewById(R.id.button2);
        mButton3 = findViewById(R.id.button3);
        mButton4 = findViewById(R.id.button4);
        mButton5 = findViewById(R.id.button5);

        sample();


        // 获取当前 activity 的根布局
        ViewGroup parent =  getWindow().getDecorView().findViewById(android.R.id.content);
        ViewGroup root = (ViewGroup)parent.getChildAt(0);
        // 监听 view 的布局变化
        root.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                // 注意:无论 statusBar 是显示还是隐藏,它的高度都是不变的,但是根布局的高度是会变的
                Toast.makeText(StatusBarDemo1.this, String.format(Locale.US, "statusBarHeight:%d, layoutHeight:%d",
                        Helper.getStatusBarHeight(StatusBarDemo1.this), root.getHeight()), Toast.LENGTH_SHORT).show();
            }
        });
    }

    private void sample() {
        mButton1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 显示 statusBar
                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
            }
        });

        mButton2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 隐藏 statusBar
                getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
            }
        });

        mButton3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 改变 statusBar 的背景色
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                    getWindow().setStatusBarColor(getResources().getColor(R.color.green));
                }
            }
        });

        mButton4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 改变 statusBar 的前景色(第 1 种颜色)
                // 这个只有 2 种颜色,要么黑要么白
                getWindow().getDecorView().setSystemUiVisibility(0);
            }
        });

        mButton5.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 改变 statusBar 的前景色(第 2 种颜色)
                // 这个只有 2 种颜色,要么黑要么白
                getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
            }
        });
    }
}

/layout/activity_ui_statusbardemo1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textAllCaps="false"
        android:text="显示 statusBar"/>

    <Button
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textAllCaps="false"
        android:text="隐藏 statusBar" />

    <Button
        android:id="@+id/button3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textAllCaps="false"
        android:text="改变 statusBar 的背景色"/>

    <Button
        android:id="@+id/button4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textAllCaps="false"
        android:text="改变 statusBar 的前景色(第 1 种颜色)"/>

    <Button
        android:id="@+id/button5"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textAllCaps="false"
        android:text="改变 statusBar 的前景色(第 2 种颜色)"/>

</LinearLayout>

项目地址 https://github.com/webabcd/AndroidDemo
作者 webabcd

posted @ 2021-06-02 08:51  webabcd  阅读(252)  评论(0编辑  收藏  举报