【Android】透明状态栏在App中的实现与接口设计

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// Activity.java// onCreate(Bundle bundle)               if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {                // Android 5.0                   int visibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE;                   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {                    // Android 6.0                       // 亮色模式,避免系统状态栏的图标不可见                       // visibility |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;                   }                   window.getDecorView().setSystemUiVisibility(visibility);                   window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);                // 自定义状态栏背景色                   window.setStatusBarColor(Color.TRANSPARENT);               } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {                // Android 4.4                   window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);               }

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// AndroidManifest.xml        <activity android:name="MyActivity"                   android:theme="@android:style/Theme.NoTitleBar"              />      // Or / 或           // MyActivity.java    public void onCreate(Bundle bundle) {          super.onCreate(bundle);          requestWindowFeature(Window.FEATURE_NO_TITLE);      }

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View.java  public WindowInsets dispatchApplyWindowInsets(WindowInsets insets)  private boolean fitSystemWindowsInt(Rect insets)    // 这个方法是真正为View添加paddingXXX的地方  protected void internalSetPadding(int left, int top, int right, int bottom)

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`onCreate` → `setContentView` → `isFixTransparentStatusbar`                                            └──true→ `fixTransparentStatusbar`

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// WhateverActivity.java      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);      }  // BaseActivity.java      @Override      public void setContentView(View view) {          rootView = view;          super.setContentView(view);            if (isFixTransparentStatusBar()) {              Window window = getWindow();              if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {                  int visibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE;                  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {                      // 亮色模式,避免系统状态栏的图标不可见                    visibility |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;                }                  window.getDecorView().setSystemUiVisibility(visibility);                  window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);                  window.setStatusBarColor(Color.TRANSPARENT);                    fixTransparentStatusBar(view);                  // 最后fix一下状态栏背景白色与系统的文字图标白色的问题                  fixTransparentStatusBarWhiteTextColor(view, viewStatusbarBackground);              } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {  //                WindowManager.LayoutParams localLayoutParams = window.getAttributes();  //                localLayoutParams.flags = (WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS | localLayoutParams.flags);                  window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);                   fixTransparentStatusBar(view);                 // 最后fix一下状态栏背景白色与系统的文字图标白色的问题                  fixTransparentStatusBarWhiteTextColor(view, viewStatusbarBackground);              } else {                  setStatusbarBackgroundGone();              }          } else {               setStatusbarBackgroundGone();          }      }

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@Overridepublic void setContentView(View view) {      contentView = view;         LinearLayout linearLayout = new LinearLayout(this);      linearLayout.setOrientation(LinearLayout.VERTICAL);        LayoutInflater.from(this).inflate(R.layout.transparent_status_bar_bg_view, linearLayout, true);      viewStatusbarBackground = linearLayout.findViewById(R.id.status_bar_background);        LayoutInflater.from(this).inflate(R.layout.titlebar_original, linearLayout, true);      viewTitlebar = linearLayout.findViewById(R.id.titlebar_layout);        initTitlebarIDs(viewTitlebar);        linearLayout.addView(contentView, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));        super.setContentView(linearLayout);  }

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// values/attrs.xml<resources>    <item name="status_bar_background" type="id"/>    <item name="titlebar_layout" type="id"/></resources>

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public class BaseFragment extends Fragment {    @Override    public void onViewCreated(View view, Bundle savedInstanceState) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT                && isFixTransparentStatusBar()) {            fixTransparentStatusBar(view);        }        super.onViewCreated(view, savedInstanceState);    }    /**     * 是否需要改变status bar背景色，对于某些机型手机（如oppo）无法改变状态栏字体颜色，     * 会被当前状态栏挡住字体颜色，因此修改透明状态栏背景色     * @return true: 调用fixTransparentStatusBar()     */    protected boolean isFixTransparentStatusBar(){        return false;    }    /**     * @param view {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)}中返回的view．     * */    protected void fixTransparentStatusBar(View view) {    }}

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<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android">    <item>        <shape android:shape="rectangle">            <solid android:color="@android:color/black" />        </shape>    </item>    <item android:bottom="1dp">        <shape android:shape="rectangle">            <solid                android:color="@android:color/white" />        </shape>    </item>    <!-- 48dp为标题栏高度　-->    <item android:bottom="48dp">        <shape xmlns:android="http://schemas.android.com/apk/res/android"            android:shape="rectangle">            <gradient                android:startColor="@android:color/white"                android:centerColor="@color/middleColor"                android:endColor="@android:color/darker_gray"                android:angle="90"                />        </shape>    </item></layer-list>

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public class ElnReactBaseActivity extends BaseActivity {    private ReactInstanceManager mReactInstanceManager;      private ReactRootView mReactRootView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);          LinearLayout linearLayout = new LinearLayout(this);        linearLayout.setOrientation(LinearLayout.VERTICAL);        viewStatusbarBackground = LayoutInflater.from(this).inflate(R.layout.transparent_status_bar_bg_view, linearLayout, false);        linearLayout.addView(viewStatusbarBackground);          mReactRootView = new ReactRootView(this);        LinearLayout.LayoutParams layParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);        linearLayout.addView(mReactRootView, layParams);          mReactInstanceManager = ReactHelper.getInstance().getReactManager();        Bundle bundle = getExtra();        mReactRootView.startReactApplication(mReactInstanceManager, "ELearning", bundle);            setContentView(linearLayout);    }}