Question

我正在为Android制作游戏并使用SurfaceView。

我想知道智能手机屏幕信息（高度，宽度等）

我使用了这段代码，但是..显示宽度和高度

的值不正确

红色总是打印“0”

我想念的是什么？

public class MainActivity extends Activity {
private int width;
private int height;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    DisplayMetrics metrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(metrics);
    width = metrics.widthPixels;
    height = metrics.heightPixels;

    setContentView(new GameView(this));
}

public class Painter extends Thread
public void run(){
    Canvas canvas = null;
    long start, end;
    int sleep;
     while(true) {
         if (runnable) {
             start = System.currentTimeMillis();

             try {
                 canvas = holder.lockCanvas(null);
                 paint.setColor(Color.RED);
                 paint.setTextSize(200);

                 synchronized (holder) {
                     canvas.drawText(Integer.toString(main.getHeight()), 600, 800, paint);
                     canvas.drawText(Integer.toString(main.getWidth()), 300, 400, paint);
                 }
             } catch (Exception e) {
                 e.printStackTrace();
             } finally {
                 holder.unlockCanvasAndPost(canvas);
             }

             end = System.currentTimeMillis();

             sleep = 1000 / FPS - (int) (end - start);
             try {
                 Thread.sleep(sleep > 0 ? sleep : 0);
             } // Try
             catch (InterruptedException e) {
                 e.printStackTrace();
             }
         }
     }

Answer 1

您可以使用此代码获取它：

DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int height = displaymetrics.heightPixels;
int width = displaymetrics.widthPixels;

适用于所有API版本，因此无需API检查。如果您在视图中，则可能需要获取上下文：

((Activity) getContext()).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);‌

Answer 2

您可以使用以下代码获取显示高度和宽度。

 OpenGL version string: 3.0 Mesa 10.3.2

Answer 3

 /*
        * A structure describing general information about a display, such as its size, density, and font scaling.
        * */
        DisplayMetrics metrics = getResources().getDisplayMetrics();

       int DeviceTotalWidth = metrics.widthPixels;
       int DeviceTotalHeight = metrics.heightPixels;

How to Get Device Height and Width at Runtime?

Answer 4

DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int width=dm.widthPixels;
int height=dm.heightPixels;
int dens=dm.densityDpi;
double wi=(double)width/(double)dens;
double hi=(double)height/(double)dens;
double x = Math.pow(wi,2);
double y = Math.pow(hi,2);
double screenInches = Math.sqrt(x+y);

（Android）我如何获得SmartPhone ScreenWidth和高度？

4 个答案: