android適配華為虛擬鍵
阿新 • • 發佈:2019-01-30
在做橫豎屏展示時,發現網上適配虛擬鍵程式碼沒有做橫屏狀態下適配,導致橫屏狀態下,底部虛擬鍵遮擋了佈局內容。
所以橫屏狀態下也需要適配華為虛擬鍵。只需要在content佈局改變時,同時記錄當前可用的檢視寬度,重新請求佈局即可。下面是程式碼:
import android.content.Context; import android.content.res.Resources; import android.graphics.Rect; import android.view.View; import android.view.ViewGroup; import android.view.ViewTreeObserver; import java.lang.reflect.Method; public class NavigationBarUtil { private static NavigationBarUtil Instance; public static NavigationBarUtil getInstance() { if (Instance != null) { Instance = new NavigationBarUtil(); } return Instance; } public void initActivity(View content) { mObserved = content; //給View新增全域性的佈局監聽器監聽檢視的變化 mObserved.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() { public void onGlobalLayout() { resetViewHeight(); } }); layoutParams = mObserved.getLayoutParams(); } private View mObserved;//被監聽的檢視 private int usableHeightView;//檢視變化前的可用高度 private int usableWidthView;//檢視變化前的可用寬度 private ViewGroup.LayoutParams layoutParams; private NavigationBarUtil() { } /** * 重置檢視的高度,使不被底部虛擬鍵遮擋 */ private void resetViewHeight() { int usableHeightViewNow = CalculateAvailableHeight(); int usableWidthViewNow = CalculateAvailableWidth(); //比較佈局變化前後的View的可用高度 if (usableHeightViewNow != usableHeightView) { //如果兩次高度不一致 //將當前的View的可用高度設定成View的實際高度 layoutParams.height = usableHeightViewNow; mObserved.requestLayout();//請求重新佈局 usableHeightView = usableHeightViewNow; } if (usableWidthViewNow != usableWidthView) { layoutParams.width = usableWidthViewNow; mObserved.requestLayout();//請求重新佈局 usableWidthView = usableWidthViewNow; } } /** * 計算檢視的寬度 * @return */ private int CalculateAvailableWidth() { Rect r = new Rect(); mObserved.getWindowVisibleDisplayFrame(r); return (r.right); } /** * 計算檢視的高度 * * @return */ private int CalculateAvailableHeight() { Rect r = new Rect(); mObserved.getWindowVisibleDisplayFrame(r); // return (r.bottom - r.top);//如果不是沉浸狀態列,需要減去頂部高度 return (r.bottom);//如果是沉浸狀態列 } /** * 判斷底部是否有虛擬鍵 * * @param context * @return */ public boolean hasNavigationBar(Context context) { boolean hasNavigationBar = false; Resources rs = context.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; } }
呼叫方式:在抽取的Activity基類中setContentView()方法後呼叫
//適配華為部分機型虛擬鍵
if (NavigationBarUtil.getInstance().hasNavigationBar(this)) {
NavigationBarUtil.getInstance().initActivity(findViewById(android.R.id.content));
}