如何以编程方式获得的屏幕尺寸在android系统如何以编程方式获得的屏幕尺寸在android系统(H

2019-06-14 09:27发布

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Android的屏幕尺寸定义为正常大XLARGE等。

它在适当的文件夹的静态资源之间自动选择。 我需要有关我的Java代码当前设备的这一数据。 该DisplayMetrics仅提供关于当前设备密度的信息。 没有可供使用的关于屏幕尺寸。

我发现在grep的代码的屏幕尺寸枚举这里然而，这似乎并没有提供给我的4.0 SDK。 有没有一种方法来获取这些信息？

Answer 1:

复制并粘贴此代码到你的Activity ，并在执行时会Toast设备的屏幕尺寸类别。 

int screenSize = getResources().getConfiguration().screenLayout &
        Configuration.SCREENLAYOUT_SIZE_MASK;

String toastMsg;
switch(screenSize) {
    case Configuration.SCREENLAYOUT_SIZE_LARGE:
        toastMsg = "Large screen";
        break;
    case Configuration.SCREENLAYOUT_SIZE_NORMAL:
        toastMsg = "Normal screen";
        break;
    case Configuration.SCREENLAYOUT_SIZE_SMALL:
        toastMsg = "Small screen";
        break;
    default:
        toastMsg = "Screen size is neither large, normal or small";
}
Toast.makeText(this, toastMsg, Toast.LENGTH_LONG).show();


Answer 2:

private static String getScreenResolution(Context context)
{
    WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    Display display = wm.getDefaultDisplay();
    DisplayMetrics metrics = new DisplayMetrics();
    display.getMetrics(metrics);
    int width = metrics.widthPixels;
    int height = metrics.heightPixels;

    return "{" + width + "," + height + "}";
}


Answer 3:

确定屏幕尺寸： 

int screenSize = getResources().getConfiguration().screenLayout &Configuration.SCREENLAYOUT_SIZE_MASK;
  switch(screenSize) {
      case Configuration.SCREENLAYOUT_SIZE_LARGE:
        Toast.makeText(this, "Large screen",Toast.LENGTH_LONG).show();
         break;
       case Configuration.SCREENLAYOUT_SIZE_NORMAL:
          Toast.makeText(this, "Normal screen",Toast.LENGTH_LONG).show();
           break;
       case Configuration.SCREENLAYOUT_SIZE_SMALL:
           Toast.makeText(this, "Small screen",Toast.LENGTH_LONG).show();
           break;
       default:
           Toast.makeText(this, "Screen size is neither large, normal or small" , Toast.LENGTH_LONG).show();

 }

确定密度： 

int density= getResources().getDisplayMetrics().densityDpi;
   switch(density)
  {
  case DisplayMetrics.DENSITY_LOW:
     Toast.makeText(context, "LDPI", Toast.LENGTH_SHORT).show();
      break;
  case DisplayMetrics.DENSITY_MEDIUM:
       Toast.makeText(context, "MDPI", Toast.LENGTH_SHORT).show();
      break;
  case DisplayMetrics.DENSITY_HIGH:
      Toast.makeText(context, "HDPI", Toast.LENGTH_SHORT).show();
      break;
  case DisplayMetrics.DENSITY_XHIGH:
       Toast.makeText(context, "XHDPI", Toast.LENGTH_SHORT).show();
      break;
  }

对于参考文献： http://devl-android.blogspot.in/2013/10/wifi-connectivity-and-hotspot-in-android.html



Answer 4:

您可以使用此代码像素获得的显示尺寸。 

Display display = getWindowManager().getDefaultDisplay();
SizeUtils.SCREEN_WIDTH = display.getWidth();
SizeUtils.SCREEN_HEIGHT = display.getHeight();


Answer 5:

你可以试试这个，这是工作示例

DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int ht = displaymetrics.heightPixels;
int wt = displaymetrics.widthPixels;

if ((getResources().getConfiguration().screenLayout &     Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE) {
Toast.makeText(this, "Large screen", Toast.LENGTH_LONG).show();}

  else if ((getResources().getConfiguration().screenLayout &  Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {
Toast.makeText(this, "Normal sized screen", Toast.LENGTH_LONG)
        .show();

  } else if ((getResources().getConfiguration().screenLayout &        Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {
Toast.makeText(this, "Small sized screen", Toast.LENGTH_LONG)
        .show();
 } else {
Toast.makeText(this,
        "Screen size is neither large, normal or small",
        Toast.LENGTH_LONG).show();
 }

 // Determine density
 DisplayMetrics metrics = new DisplayMetrics();
 getWindowManager().getDefaultDisplay().getMetrics(metrics);
 int density = metrics.densityDpi;

 if (density == DisplayMetrics.DENSITY_HIGH) {
Toast.makeText(this,
        "DENSITY_HIGH... Density is " + String.valueOf(density),
        Toast.LENGTH_LONG).show();
 } else if (density == DisplayMetrics.DENSITY_MEDIUM) {
Toast.makeText(this,
        "DENSITY_MEDIUM... Density is " + String.valueOf(density),
        Toast.LENGTH_LONG).show();
 } else if (density == DisplayMetrics.DENSITY_LOW) {
Toast.makeText(this,
        "DENSITY_LOW... Density is " + String.valueOf(density),
        Toast.LENGTH_LONG).show();
 } else {
Toast.makeText(
        this,
        "Density is neither HIGH, MEDIUM OR LOW.  Density is "
                + String.valueOf(density), Toast.LENGTH_LONG)
        .show();
 }

 // These are deprecated
 Display display = ((WindowManager) getSystemService(Context.WINDOW_SERVICE))
    .getDefaultDisplay();
 int  width = display.getWidth();
 int height = display.getHeight();


Answer 6:

我认为这是一个非常简单的一段简单的代码！ 

public Map<String, Integer> deriveMetrics(Activity activity) {
    try {
        DisplayMetrics metrics = new DisplayMetrics();

        if (activity != null) {
            activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
        }

        Map<String, Integer> map = new HashMap<String, Integer>();
        map.put("screenWidth", Integer.valueOf(metrics.widthPixels));
        map.put("screenHeight", Integer.valueOf(metrics.heightPixels));
        map.put("screenDensity", Integer.valueOf(metrics.densityDpi));

        return map;
    } catch (Exception err) {
        ; // just use zero values
        return null;
    }
}

这种方法现在可以在任何地方独立使用。 无论你想获得有关设备的屏幕信息，做到这一点，如下所示： 

        Map<String, Integer> map = deriveMetrics2(this);
        map.get("screenWidth");
        map.get("screenHeight");
        map.get("screenDensity");

希望这会有所帮助的人在那里，可能会发现它更容易使用。 如果我需要重新修正或改进，请不要犹豫，让我知道！ :-)

干杯！！！



Answer 7:

DisplayMetrics displayMetrics = new DisplayMetrics();

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

int width = displayMetrics.widthPixels;

int height = displayMetrics.heightPixels;


Answer 8:

simon-

不同的屏幕尺寸有不同的像素密度。 您的手机上一个4英寸的显示屏可以有更多或更少的像素则说一个26英寸的电视机。 如果进出口正确理解他要检测其尺寸组的当前屏幕，小，正常，大，超大。 我能想到的唯一的事情是检测像素密度，并用它来确定屏幕的实际尺寸。



Answer 9:

我需要这样的一对夫妇我的应用程序和下面的代码是我解决问题的办法。 只是露出里面的onCreate代码。 这是一个独立的应用程序在任何设备上运行，返回屏幕信息。 

setContentView(R.layout.activity_main);
    txSize = (TextView) findViewById(R.id.tvSize);

    density = (TextView) findViewById(R.id.density);
    densityDpi = (TextView) findViewById(R.id.densityDpi);
    widthPixels = (TextView) findViewById(R.id.widthPixels);
    xdpi = (TextView) findViewById(R.id.xdpi);
    ydpi = (TextView) findViewById(R.id.ydpi);

    Configuration config = getResources().getConfiguration();

    if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE) {
        Toast.makeText(this, "Large screen", Toast.LENGTH_LONG).show();
        txSize.setText("Large screen");
    } else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {
        Toast.makeText(this, "Normal sized screen", Toast.LENGTH_LONG)
                .show();
        txSize.setText("Normal sized screen");
    } else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {
        Toast.makeText(this, "Small sized screen", Toast.LENGTH_LONG)
                .show();
        txSize.setText("Small sized screen");
    } else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_XLARGE) {
        Toast.makeText(this, "xLarge sized screen", Toast.LENGTH_LONG)
                .show();
        txSize.setText("Small sized screen");
    } else {
        Toast.makeText(this,
                "Screen size is neither large, normal or small",
                Toast.LENGTH_LONG).show();
        txSize.setText("Screen size is neither large, normal or small");
    }

    Display display = getWindowManager().getDefaultDisplay();
    DisplayMetrics metrics = new DisplayMetrics();
    display.getMetrics(metrics);

    Log.i(TAG, "density :" + metrics.density);
    density.setText("density :" + metrics.density);

    Log.i(TAG, "D density :" + metrics.densityDpi);
    densityDpi.setText("densityDpi :" + metrics.densityDpi);

    Log.i(TAG, "width pix :" + metrics.widthPixels);
    widthPixels.setText("widthPixels :" + metrics.widthPixels);

    Log.i(TAG, "xdpi :" + metrics.xdpi);
    xdpi.setText("xdpi :" + metrics.xdpi);

    Log.i(TAG, "ydpi :" + metrics.ydpi);
    ydpi.setText("ydpi :" + metrics.ydpi);

而一个简单的XML文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >

<TextView
    android:id="@+id/tvSize"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
     />
<TextView
    android:id="@+id/density"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
     />
<TextView
    android:id="@+id/densityDpi"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
     />
<TextView
    android:id="@+id/widthPixels"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
     />
<TextView
    android:id="@+id/xdpi"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
     />
<TextView
    android:id="@+id/ydpi"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />



Answer 10:

我肯定错过了什么。 DisplayMetrics.widthPixels，DisplayMetrics.heightPixels？

http://developer.android.com/reference/android/util/DisplayMetrics.html#heightPixels

[编辑]

啊，我失去了一些东西。 一个大脑！ +1亚历克斯。



Answer 11:

如果你是在非活性，即片段，适配器，Model类或任何其他Java类不扩展Activity只是getResources()将无法工作。 您可以使用getActivity()的片段或使用context ，你传递给相应的类。 

mContext.getResources()

我建议做一类说utils的，将有方法/方法的共同工作。 这样做的好处是，你可以在应用程序调用此方法在任何地方获得期望的结果与一行代码。



Answer 12:

该算法下面可以用来识别哪些类别将用于静态资源之间选择，也迎合了新的XX和XXX高密度

    DisplayMetrics displayMetrics = new DisplayMetrics();
    activity.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
    mDensityDpi = displayMetrics.densityDpi;
    mDensity = displayMetrics.density;
    mDisplayWidth = displayMetrics.widthPixels;
    mDisplayHeight = displayMetrics.heightPixels;

    String densityStr = "Unknown";
    int difference, leastDifference = 9999;

    difference = Math.abs(mDensityDpi - DisplayMetrics.DENSITY_LOW);
    if (difference < leastDifference) {
        leastDifference = difference;
        densityStr = "LOW";
    }

    difference = Math.abs(mDensityDpi - DisplayMetrics.DENSITY_MEDIUM);
    if (difference < leastDifference) {
        leastDifference = difference;
        densityStr = "MEDIUM";
    }

    difference = Math.abs(mDensityDpi - DisplayMetrics.DENSITY_HIGH);
    if (difference < leastDifference) {
        leastDifference = difference;
        densityStr = "HIGH";
    }

    difference = Math.abs(mDensityDpi - DisplayMetrics.DENSITY_XHIGH);
    if (difference < leastDifference) {
        leastDifference = difference;
        densityStr = "XHIGH";
    }

    difference = Math.abs(mDensityDpi - DisplayMetrics.DENSITY_XXHIGH);
    if (difference < leastDifference) {
        leastDifference = difference;
        densityStr = "XXHIGH";
    }

    difference = Math.abs(mDensityDpi - DisplayMetrics.DENSITY_XXXHIGH);
    if (difference < leastDifference) {
        densityStr = "XXXHIGH";
    }

    Log.i(TAG, String.format("Display [h,w]: [%s,%s] Density: %s Density DPI: %s [%s]", mDisplayHeight, mDisplayWidth, mDensity, mDensityDpi, densityStr));


文章来源: How do I get the ScreenSize programmatically in android
标签： android android-screen
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