Question

我一直在努力将其付诸实践。只要我保持状态栏可见，该应用程序的大小就会很好地调整。根据此post，这是一个Android错误，但问题已解决但尚未解决。

从我读到的所有内容来看，玩Insets应该可以解决问题，但我无法发挥作用。不确定是否应该采用这种方式。

此post之后，我将以下代码添加到OnCreate中。

ViewCompat.setOnApplyWindowInsetsListener(getWindow().getDecorView().getRootView(), new OnApplyWindowInsetsListener() {
    @Override
    public WindowInsetsCompat onApplyWindowInsets(View view, WindowInsetsCompat insets) {

        ((ViewGroup.MarginLayoutParams) view.getLayoutParams()).topMargin =
            insets.getSystemWindowInsetTop();

        return insets.consumeSystemWindowInsets();
   }   
});

它引发异常：

java.lang.ClassCastException：android.view.WindowManager $ LayoutParams 无法转换为android.view.ViewGroup $ MarginLayoutParams

帖子继续，但我被困在这里，并且怀疑我是否走对了路。

如果有人要尝试，请使用我正在使用的测试代码。效果很好，直到通过向AppTheme添加<item name="android:windowFullscreen">true</item>删除状态栏为止。

AndroidManifest.xml：

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

    <activity android:name=".MainActivity"
        android:windowSoftInputMode="adjustResize"> 
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

activity_mail.xml：

<!-- this control should be position static -->
    <TextView
        android:layout_height="50dp"
        android:layout_width="fill_parent"
        android:background="@color/colorPrimaryDark"
        android:text="static window at top"
        android:gravity="center"
        />

<!-- the resizable view  -->
<android.support.v7.widget.RecyclerView
    android:id="@+id/my_list"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    android:transcriptMode="normal">
</android.support.v7.widget.RecyclerView>

<!-- use this EditText box to call softKeyboard-->
<android.support.v7.widget.AppCompatEditText
    android:id="@+id/cv_bottom_bar_edit"
    style="@style/Widget.AppCompat.AutoCompleteTextView"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:textSize="18sp"
    android:background="@color/colorPrimaryDark"
    android:gravity="center"
    />

row.xml：

<?xml version="1.0" encoding="utf-8"?>
<TextView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#F06060"
    android:layout_margin="30dp"
    android:padding="5dp"
    android:textSize="25sp"
    android:gravity="center"
>

MainActivity.java：

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

    mRecyclerView = findViewById(R.id.my_list);
    mRecyclerView.setHasFixedSize(true);

    mLayoutManager = new LinearLayoutManager(this);
    mRecyclerView.setLayoutManager(mLayoutManager);

    String[] myDataset = new String[]{"1", "2", "3","4","5","6","7","8","9"};

    mAdapter = new MyAdapter(myDataset);
    mRecyclerView.setAdapter(mAdapter);

}

更新：我将windowFullscreen属性从清单移到了AppTheme，因为Android并未从清单中读取它。

Answer 1

注意此行：

((ViewGroup.MarginLayoutParams) view.getLayoutParams()).topMargin =
            insets.getSystemWindowInsetTop();//what's the parent of "view"

根据getLayoutParams说，您应该知道“视图”的父级是什么，例如，如果父级为FrameLayout，则应这样做：

((FrameLayout.LayoutParams) view.getLayoutParams()).topMargin =
                insets.getSystemWindowInsetTop();

如果父对象是relativelayout或linearlayout，也请切换到上述的确定类型。

已编辑：尝试此操作

((WindowManager.LayoutParams) view.getLayoutParams()).topMargin =
                    insets.getSystemWindowInsetTop();

Answer 2

public class AndroidBug5497Workaround extends AppCompatActivity {

// For more information, see https://issuetracker.google.com/issues/36911528
// To use this class, simply invoke assistActivity() on an Activity that already has its content view set.

private ViewGroup contentContainer;
private ViewTreeObserver viewTreeObserver;
private Rect contentAreaOfWindowBounds = new Rect();
private LinearLayout.LayoutParams rootViewLayout; //-->change to the view root control type of your view.
private int usableHeightPrevious = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    contentContainer = findViewById(android.R.id.content);
    rootViewLayout = (LinearLayout.LayoutParams) contentContainer.getLayoutParams();
}

@Override
protected void onPause() {
    super.onPause();
    if (viewTreeObserver.isAlive()) {

        viewTreeObserver.removeOnGlobalLayoutListener(listener);
    }
}

@Override
protected void onResume() {
    super.onResume();
    if (viewTreeObserver == null || !viewTreeObserver.isAlive()) {
        viewTreeObserver = contentContainer.getViewTreeObserver();
    }

    viewTreeObserver.addOnGlobalLayoutListener(listener);
}

@Override
protected void onDestroy() {
    super.onDestroy();
    contentContainer = null;
    viewTreeObserver = null;
}

ViewTreeObserver.OnGlobalLayoutListener listener = new ViewTreeObserver.OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
        contentContainer.getWindowVisibleDisplayFrame(contentAreaOfWindowBounds);
        int usableHeightNow = contentAreaOfWindowBounds.height();

        if (usableHeightNow != usableHeightPrevious) {
            rootViewLayout.height = usableHeightNow;
            contentContainer.layout(contentAreaOfWindowBounds.left, contentAreaOfWindowBounds.top, contentAreaOfWindowBounds.right, contentAreaOfWindowBounds.bottom);
            contentContainer.requestLayout();

            usableHeightPrevious = usableHeightNow;
        }
    }
};

}

从github上的facebook/react-native问题中得到了它。普通活动略有简化。从api 21开始，可以很好地处理人像和风景，但是经过了更多测试。小心使用。

隐藏statusBar时如何强制windowSoftInputMode AdjustResize

2 个答案: