如何在运行时获取设备高度和宽度?
我正在开发一个应用程序，我必须使我们的应用程序适合各种设备 - 平板电脑和安卓手机.现在我想在运行时获取设备的高度和宽度，并在我的代码中实现它，以便我的应用程序适用于横向和纵向.
I am developing an app in which I have to make our app to fit for every device - for both tablet and android mobiles. Now I want to get the device height and width at runtime and implement it in my code so that my app works for both landscape and portrait.
我的 XML 文件是:
My XML file is:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="2" android:orientation="vertical">
<LinearLayout android:id="@+id/linearLayout1" android:layout_height="match_parent"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_weight="1">
<LinearLayout android:id="@+id/linearLayout1" android:layout_height="match_parent"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_weight="1" android:weightSum="100">
<TextView android:id="@+id/letter1" android:gravity="center" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="60"></TextView>
<TextView android:id="@+id/letter2" android:gravity="center" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="20"></TextView>
<TextView android:id="@+id/letter3" android:gravity="center" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="20"></TextView>
</LinearLayout>
<LinearLayout android:id="@+id/linearLayout1" android:layout_height="match_parent"
android:gravity="center"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_weight="1">
<ImageView android:id="@+id/imag"
android:gravity="center"
android:scaleType = "fitCenter"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:layout_gravity="center">
</ImageView>
</LinearLayout>
</LinearLayout>
<LinearLayout android:layout_gravity="bottom"
android:id="@+id/linearLayout2"
android:layout_height="wrap_content" android:orientation="horizontal" android:layout_width="match_parent">
<Button android:id="@+id/previous" android:layout_width="wrap_content" android:layout_weight="1" android:text="Previous" android:layout_height="wrap_content" ></Button>
<Button android:id="@+id/practice" android:layout_width="wrap_content" android:layout_weight="1" android:text="Practice" android:layout_height="wrap_content" android:onClick="onClick"></Button>
<Button android:id="@+id/home" android:layout_width="wrap_content" android:layout_weight="1" android:text="Home" android:layout_height="wrap_content"></Button>
<Button android:id="@+id/spell" android:layout_width="wrap_content" android:layout_weight="1" android:text="Spell" android:layout_height="wrap_content" android:onClick="Content"></Button>
<Button android:id="@+id/next" android:layout_width="wrap_content" android:layout_weight="1" android:text="Next" android:layout_height="wrap_content" android:onClick="Content"></Button>
</LinearLayout>
</LinearLayout>
我的 Java 文件是:
My Java file is:
package com.android;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Typeface;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.android.SimpleGestureFilter.SimpleGestureListener;
public class MySwara extends Activity implements SimpleGestureListener {
private SimpleGestureFilter detector;
private static int counter=-1;
private String[] mBtn1 ={"C","D","E","F","G","H","IÄ","J","K","L","M","N","O","CA","CB"};
private TextView txtLetter;
private ImageView imgLetter;
private int[] imgArr={R.drawable.w1,R.drawable.w2,R.drawable.w3,R.drawable.w4,R.drawable.w5,R.drawable.w6,R.drawable.w7,R.drawable.w8,R.drawable.w9,R.drawable.w10,R.drawable.w11,R.drawable.w12,
R.drawable.w13,R.drawable.w14,R.drawable.w15};
private TextView txtKannada;
private String[] mBtn2 = {"CgÀ¸À","DªÉÄ","E°","F±À","GqÀ","Hl","IĶ","J¯É","Kr","LzÀÄ","M¯É","N¯É","OµÀzsÀ",
"CAUÀr","CB"};
private String[] mBtn3 = {"ARASA","AME","ILI","ISA","UDA","UTA","RUSHI","ELE","EDI","AIDU","oLE","OLE","AUSHADA",
"ANGADI","AHA"};
private TextView txtEnglish;
private int[] mAudio = {R.raw.a,R.raw.b,R.raw.c,R.raw.d,R.raw.e,R.raw.f,R.raw.g,R.raw.h,R.raw.i,R.raw.j,
R.raw.k,R.raw.l,R.raw.m,R.raw.n,R.raw.o};
protected MediaPlayer mp;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.content);
detector = new SimpleGestureFilter(this,this);
if(counter == -1)
counter =getIntent().getExtras().getInt("POSITION");
Typeface tf = Typeface.createFromAsset(getBaseContext().getAssets(), "fonts/brhknd.ttf");
txtLetter = (TextView)findViewById(R.id.letter1);
txtKannada = (TextView)findViewById(R.id.letter2);
txtEnglish = (TextView)findViewById(R.id.letter3);
imgLetter = (ImageView)findViewById(R.id.imag);
txtLetter.setTypeface(tf);
txtLetter.setText(mBtn1[counter]);
//txtLetter.setTextSize(350);
Bitmap bm = BitmapFactory.decodeResource(getResources(), imgArr[counter]);
imgLetter.setImageBitmap(bm);
txtKannada.setTypeface(tf);
txtKannada.setText(mBtn2[counter]);
//txtKannada.setTextSize(100);
txtEnglish.setText(mBtn3[counter]);
//txtEnglish.setTextSize(50);
Button btnNext = (Button)findViewById(R.id.next);
btnNext.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(counter<imgArr.length-1)
counter++;
changeContent();
}
});
Button mPlay = (Button)findViewById(R.id.spell);
mPlay.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mp = MediaPlayer.create(MySwara.this, mAudio[counter]);
mp.start();
}
});
Button btnPrvs = (Button)findViewById(R.id.previous);
btnPrvs.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(counter>0)
counter--;
changeContent();
}
});
Button btnPractice = (Button)findViewById(R.id.practice);
btnPractice.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MySwara.this,DrawingActivity.class);
startActivity(intent);
}
});
Button btnHome = (Button)findViewById(R.id.home);
btnHome.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MySwara.this,mainClass.class);
startActivity(intent);
}
});
}
public void changeContent()
{
txtLetter.setText(mBtn1[counter]);
txtKannada.setText(mBtn2[counter]);
txtEnglish.setText(mBtn3[counter]);
//imgLetter.setBackgroundResource(imgArr[counter]);
Bitmap bm = BitmapFactory.decodeResource(getResources(), imgArr[counter]);
imgLetter.setImageBitmap(bm);
}
@Override
public boolean dispatchTouchEvent(MotionEvent me){
this.detector.onTouchEvent(me);
return super.dispatchTouchEvent(me);
}
@Override
public void onSwipe(int direction) {
String str = "";
switch (direction) {
case SimpleGestureFilter.SWIPE_RIGHT : str = "Swipe Right";
if(counter>0)
counter--;
changeContent();
break;
case SimpleGestureFilter.SWIPE_LEFT : str = "Swipe Left";
if(counter<imgArr.length-1)
counter++;
changeContent();
break;
}
}
@Override
public void onDoubleTap() {
// TODO Auto-generated method stub
}
}
推荐答案
Display mDisplay = activity.getWindowManager().getDefaultDisplay();
final int width = mDisplay.getWidth();
final int height = mDisplay.getHeight();
这样就可以得到屏幕大小了.
This way you can get the screen size.
由于此 API 在新的 SDK 版本中已被弃用，因此您可以使用它.
Since this API is depricated in the new SDK versions you can use this.
DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
int width = displayMetrics.widthPixels;
int height = displayMetrics.heightPixels;
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