getSize() 给我错误

Question

当我实施时

WindowManager wm = ((WindowManager)context.getSystemService(context.WINDOW_SERVICE));
Display display = wm.getDefaultDisplay();
m_nDisplayWidth = display.getWidth();
m_nDisplayHeight    = display.getHeight();

我可以正常运行，但是当我实现 getSize 时，我得到 runtimeError

Point size = new Point();
display.getSize(size); //Error right here
m_nDisplayWidth = size.x;
m_nDisplayHeight = size.y;

Logcat：

03-11 01:45:25.865: E/AndroidRuntime(18835): FATAL EXCEPTION: main 
03-11 01:45:25.865: E/AndroidRuntime(18835): android.view.InflateException: Binary XML file line #7: Error inflating class com.brain.development.GameRun
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.createView(LayoutInflater.java:518)
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:570)
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:215) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.app.Activity.setContentView(Activity.java:1679) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.brain.development.BrainDevelopmentActivity$1.onClick(BrainDevelopmentActivity.java:25) 03-11 01:45:25.865: E/AndroidRuntime(18835):  at android.view.View.performClick(View.java:2582) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.View$PerformClick.run(View.java:9252) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.os.Handler.handleCallback(Handler.java:587) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.os.Handler.dispatchMessage(Handler.java:92) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.os.Looper.loop(Looper.java:130) 03-11 01:45:25.865: E/AndroidRuntime(18835):     at android.app.ActivityThread.main(ActivityThread.java:3691) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at java.lang.reflect.Method.invokeNative(Native Method) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at java.lang.reflect.Method.invoke(Method.java:507) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at dalvik.system.NativeStart.main(Native Method) 
03-11 01:45:25.865: E/AndroidRuntime(18835): Caused by: java.lang.reflect.InvocationTargetException 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at java.lang.reflect.Constructor.constructNative(Native Method) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at java.lang.reflect.Constructor.newInstance(Constructor.java:415) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.createView(LayoutInflater.java:505) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    ... 19 more 
03-11 01:45:25.865: E/AndroidRuntime(18835): Caused by: java.lang.NoSuchMethodError: android.view.Display.getSize 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.brain.development.GameRun$GameThread.<init>(GameRun.java:46) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.brain.development.GameRun.<init>(GameRun.java:97) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    ... 22 more

Answer 1

这支持旧设备和新设备：

private static Point getDisplaySize(final Display display) {
    final Point point = new Point();
    try {
        display.getSize(point);
    } catch (java.lang.NoSuchMethodError ignore) { // Older device
        point.x = display.getWidth();
        point.y = display.getHeight();
    }
    return point;
}

Answer 2

获取所有设备显示尺寸的方法：

private static Point getDisplaySize(final Display display) {
    Point point = new Point();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) { // API LEVEL 13
        display.getSize(point);
    } else {    
        point.x = display.getWidth();
        point.y = display.getHeight();
    }
    return point;
}

开始尺寸：

WindowManager wm = ((WindowManager)context.getSystemService(context.WINDOW_SERVICE));
Display display = wm.getDefaultDisplay();
Point myPoint = getDisplaySize(display);    
Log.i("***Size X::", String.valueOf(myPoint.x));
Log.i("***Size Y::", String.valueOf(myPoint.y));

Answer 3

此版本也适用于 API

@SuppressWarnings("deprecation")
@TargetApi(VERSION_CODES.HONEYCOMB_MR2)
public static Point getSize(Display display) {
    Point point = new Point();
    if (sdkInt() >= VERSION_CODES.HONEYCOMB_MR2) {
        display.getSize(point);
    } else {
        point.set(display.getWidth(), display.getHeight());
    }
    return point;
}

@SuppressWarnings("deprecation")
public static int sdkInt() {
    return Integer.parseInt(VERSION.SDK);
}

Answer 4

试试这个，它对我有用。

getWindowManager().getDefaultDisplay().getWidth();

Answer 5

尝试改用它：

Display display = getWindowManager().getDefaultDisplay();

没有它，我看不出这段代码有什么问题...

Answer 6

很抱歉我迟到了，但请确保您使用的是 android sdk 13 或更高版本。

Answer 7

这是实用方法，您可以使用：

public static int getWidth(Context context) {
    WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    Display display = windowManager.getDefaultDisplay();
    Point size = new Point();
    int width;
    if (Build.VERSION.SDK_INT >= 13) {
        display.getSize(size);
        width = size.x;
    } else {
        width = display.getWidth();
    }
    return width;
}