Android手機解析度測試程式

該程式可以測試出個人手機裝置的解析度，屬於哪種dpi層級，以便開發參考。

main.xml

<?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"/><Buttonandroid: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"/><EditTextandroid:id="@+id/showDPI"android:layout_width="fill_parent"android:layout_height="wrap_content"android:inputType="text"android:editable="false"/></LinearLayout>

string.xml

<?xml version="1.0" encoding="utf-8"?><resources><string name="hello">Hello World, AndroidDPI!</string><string name="app_name">AndroidDPI</string><string name="screenSize">輸入該裝置的螢幕大小：</string><string name="submit">確認</string></resources>

Java代碼：

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() {@Overridepublic void onClick(View v) {if(size.length() == 0){size.setText("請輸入該螢幕的尺寸");}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("手機螢幕解析度為："+width+"*"+height);double dpi = Math.sqrt(height*height +width*width)/sizeInt;String dpiType = "";if(dpi >320){dpiType = "屬於xhdpi";}else if(dpi>240){dpiType = "屬於hdpi";}else if(dpi>160){dpiType = "屬於mdpi";}else if(dpi>120){dpiType = "屬於ldpi";}showDPI.setText("手機DPI是:"+ dpi+ ","+ dpiType);}}});    }}

顯示結果：