Android手机分辨率测试程序

该程序可以测试出个人手机设备的分辨率，属于哪种dpi级别，以便开发参考。

main.xml

[html]
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/screenSize"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/screenSize"
        />

    <EditText
        android:id="@+id/size"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="numberDecimal"
        />
    <Button
        android:id="@+id/submit"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/submit"
        />
    <EditText
        android:id="@+id/showWidth"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="text"
        android:editable="false"
        />

    <EditText
        android:id="@+id/showDPI"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="text"
        android:editable="false"
        />



</LinearLayout>

string.xml

[html]
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, AndroidDPI!</string>
    <string name="app_name">AndroidDPI</string>
    <string name="screenSize">输入该设备的屏幕大小：</string>
    <string name="submit">确认</string>
</resources>

Java代码：

[java]
package com.shine.android;

import android.app.Activity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class AndroidDPI extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        final EditText size = (EditText) findViewById(R.id.size);
        final EditText showWidth = (EditText) findViewById(R.id.showWidth);
        final EditText showDPI = (EditText) findViewById(R.id.showDPI);
        Button submit = (Button) findViewById(R.id.submit);

        submit.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if(size.length() == 0){
                    size.setText("请输入该屏幕的尺寸");
                }else {
                    DisplayMetrics dm = new DisplayMetrics();
                    getWindowManager().getDefaultDisplay().getMetrics(dm);
                    int width = dm.widthPixels;
                    int height =dm.heightPixels;
                    float sizeInt = Float.parseFloat(size.getText().toString());
                    showWidth.setText("手机屏幕分辨率为："+width+"*"+height);
                    double dpi = Math.sqrt(height*height +width*width)/sizeInt;
                    String dpiType = "";
                    if(dpi >320){
                        dpiType = "属于xhdpi";
                    }else if(dpi>240){
                   &n

补充：移动开发 , Android ,