沉浸式解决 任意修改状态栏 虚拟按键 背景和高度 测量虚拟按键高度 状态栏高度

本文主要介绍沉浸式的一种解决方案。

## 使用方法 ##
实现onCreate() 返回你的主视图即可

public class MainActivity extends BaseActivityRex {    @Override    protected int onCreate() {        return R.layout.activity_main;    }    @Override    protected void initView() {    }｝

核心原理

1.根据资源ID获取状态栏高度 和手机带虚拟键盘高度 响应的尺寸值
根据版本打开沉浸式后，得到其占位可自定义其显示
或者设为0让它全屏，一般下方会有一些按钮 全屏按钮和 虚拟键盘重叠十分不好看。

2.动态布局添加 让主视图成为 一部分view。方便自定义一些共用布局，和视图操作。如过度画面啊 加载界面
或者 全局性的title bar都可以在添加statusView后 自行添加。

3.简化了下find id

都是些小东西 自己用起来觉得方便。分享给大家。由于经常要交接代码给别人，所以习惯用原生可见易理解的东西封装。

源码

package your packageimport android.app.Activity;import android.content.Intent;import android.content.pm.ActivityInfo;import android.content.res.Resources;import android.graphics.Color;import android.os.Build;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.FragmentActivity;import android.util.Log;import android.view.View;import android.view.ViewGroup;import android.view.WindowManager;import android.widget.LinearLayout;import java.lang.reflect.Method;/** * 简化activity流程 * 完美适配所有的可用沉浸式 * 如果该版本存在，直接操作statusView navigationView 可自定义沉浸式 具体显示的内容 颜色 并非要和 相连颜色一致 * 如果不想要占位，设为高度0即可 那么你的主视图内容就会延伸占到statusView navigationView位置 */public abstract class BaseActivityRex extends FragmentActivity {    private boolean is_new_version = false;    public Bundle savedInstanceState = null;    private Activity activity;    private View statusView;    private View navigationView;    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        activity = BaseActivityRex.this;        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);        //竖屏        this.savedInstanceState = savedInstanceState;        if ((Intent.FLAG_ACTIVITY_CLEAR_TOP & getIntent().getFlags()) != 0) {            finish();        }        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            //透明状态栏            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            //透明导航栏            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);            is_new_version = true;        } else {            is_new_version = false;        }        int mainUi = onCreate();        intSetContentView(mainUi);        onCreateWithBundle(savedInstanceState);        initView();        initData();    }    private void intSetContentView(int mainUiId) {        LinearLayout.LayoutParams lp_root = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 0);        LinearLayout linearRoot = new LinearLayout(activity);        linearRoot.setOrientation(LinearLayout.VERTICAL);        setContentView(linearRoot);        //添加状态栏占位        LinearLayout.LayoutParams lp_status = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 0);        statusView = new View(linearRoot.getContext());        linearRoot.addView(statusView, lp_status);        //添加主视图父容器        LinearLayout.LayoutParams lp_main_ui_parent = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 0, 1);        LinearLayout main_ui_parent = new LinearLayout(linearRoot.getContext());        linearRoot.addView(main_ui_parent, lp_main_ui_parent);        //虚拟按键占位        navigationView = new View(linearRoot.getContext());        linearRoot.addView(navigationView, lp_status);        //添加主视图        if (mainUiId > 0) {            View view = View.inflate(activity, mainUiId, null);            main_ui_parent.addView(view);        }    }    protected void onCreateWithBundle(Bundle savedInstanceState) {    }    @Override    protected void onStart() {        super.onStart();        Resources resources = getResources();        if (!is_new_version) {            if (statusView != null) {                statusView.setVisibility(View.GONE);            }        } else {            /**             * 获取状态栏高度——方法1             * */            int statusBarHeight = -1;            //获取status_bar_height资源的ID            int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android");            if (resourceId > 0) {                statusView.setVisibility(View.VISIBLE);                //根据资源ID获取响应的尺寸值                statusBarHeight = getResources().getDimensionPixelSize(resourceId);                ViewGroup.LayoutParams lp = statusView.getLayoutParams();                lp.width = ViewGroup.LayoutParams.MATCH_PARENT;                lp.height = statusBarHeight;                statusView.setLayoutParams(lp);                Log.d("rex", "statusBarHeight===" + statusBarHeight);            }        }        if (navigationView != null) {            if (getHasNavigationBar()) {                navigationView.setVisibility(View.VISIBLE);                int resourceId = resources.getIdentifier("navigation_bar_height",                        "dimen", "android");                //动态获取NavigationBar的高度                int height = resources.getDimensionPixelSize(resourceId);                ViewGroup.LayoutParams lp = navigationView.getLayoutParams();                lp.width = ViewGroup.LayoutParams.MATCH_PARENT;                lp.height = height;                navigationView.setLayoutParams(lp);                Log.d("rex", "navigation_bar_height===" + height);//                int resourceId2 = resources.getIdentifier("status_bar_height",//                        "dimen", "android");//                int height2 = resources.getDimensionPixelSize(resourceId2);//                Log.d("rex", "height2===" + height2);            } else {                navigationView.setVisibility(View.GONE);            }        }    }    protected abstract int onCreate();//返回主布局    protected abstract void initView();    public void initData() {    }    public <T> T Fid(int id) {        T t = (T) findViewById(id);        return t;    }    /**     * 判断是否存在虚拟键盘     *     * @return     */    public boolean getHasNavigationBar() {        boolean hasNavigationBar = false;        Resources rs = getResources();        int id = rs.getIdentifier("config_showNavigationBar", "bool", "android");        if (id > 0) {            hasNavigationBar = rs.getBoolean(id);        }        try {            Class systemPropertiesClass = Class.forName("android.os.SystemProperties");            Method m = systemPropertiesClass.getMethod("get", String.class);            String navBarOverride = (String) m.invoke(systemPropertiesClass, "qemu.hw.mainkeys");            if ("1".equals(navBarOverride)) {                hasNavigationBar = false;            } else if ("0".equals(navBarOverride)) {                hasNavigationBar = true;            }        } catch (Exception e) {        }        return hasNavigationBar;    }}