获取Android设备信息

在开发的过程中有可能根据需要显示一些设备的状态或系统信息。下面是收集到的一些信息

一、获取当前电量

每当电量改变时系统都会广播发Intent.ACTION_BATTERY_CHANGED消息出来，应用程序只需要注册并创建一个接收器就能获取当前的电量

创建一个广播接收器类BatteryInfoReceiver.java

package com.example.getdeviceinfo;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.widget.Toast;//接收电池改变的消息public class BatteryInfoReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubint level = intent.getIntExtra("level", Integer.MAX_VALUE);Toast.makeText(context, String.valueOf(level) + "%", Toast.LENGTH_SHORT).show();}}

当点击按钮时注册Intent.ACTION_BATTERY_CHANGED消息

package com.example.getdeviceinfo;import android.app.Activity;import android.content.BroadcastReceiver;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity {private Button batteryBtn = null;private BroadcastReceiver batteryReceiver = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);batteryReceiver = new BatteryInfoReceiver();InitBtn();batteryBtn.setOnClickListener(new batteryListener());}private void InitBtn() {batteryBtn = (Button) findViewById(R.id.battery);wifiBtn = (Button) findViewById(R.id.wifi);}class batteryListener implements OnClickListener {@Overridepublic void onClick(View v) {// TODO Auto-generated method stub//注册消息registerReceiver(batteryReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));}}}

二、获取Wifi的状态，只要用到WifiManager类

按钮响应函数代码

class wifiListener implements OnClickListener {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubWifiManager wifi = (WifiManager) MainActivity.this.getSystemService(Context.WIFI_SERVICE);String wifiState = null;int state = wifi.getWifiState();switch (state) {case WifiManager.WIFI_STATE_DISABLED:wifiState = "已经关闭";break;case WifiManager.WIFI_STATE_DISABLING:wifiState = "正在关闭...";break;case WifiManager.WIFI_STATE_ENABLED:wifiState = "已经打开";break;case WifiManager.WIFI_STATE_ENABLING:wifiState = "正在打开...";break;case WifiManager.WIFI_STATE_UNKNOWN:wifiState = "未知状态";break;default:break;}Toast.makeText(MainActivity.this, "获取wifi " + wifiState,Toast.LENGTH_SHORT).show();}}

效果：

三、获取当前系统信息

/** * 获取设备型号、SDK版本及系统版本 *  * @author Administrator *  */class androidInfoListener implements OnClickListener {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubString device_model = Build.MODEL; // 设备型号int version_sdk = Build.VERSION.SDK_INT; // 设备SDK版本String version_release = Build.VERSION.RELEASE; // 设备的系统版本String str = "device_model = " + device_model + "  version_sdk = "+ version_sdk + "  version_release = " + version_release;Toast.makeText(getApplicationContext(), str, Toast.LENGTH_SHORT).show();}}

四、获取屏幕宽高

/** * 获取屏幕宽高 *  * @author Administrator *  */class screenInfoListener implements OnClickListener {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubDisplayMetrics displayMetrics = new DisplayMetrics();MainActivity.this.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);int height = displayMetrics.heightPixels;int width = displayMetrics.widthPixels;double diagonalPixels = Math.sqrt(Math.pow(displayMetrics.widthPixels, 2)+ Math.pow(displayMetrics.heightPixels, 2));double pixels = diagonalPixels / (160 * displayMetrics.density);String str = "height = " + height + "  width = " + width+ " pixels = " + pixels;Toast.makeText(getApplicationContext(), str, Toast.LENGTH_SHORT).show();}}

五、获取当前程序路径和获取已安装的程序列表

/** * 获取当前程序路径和获取已安装的程序列表 *  * @author Administrator *  */class pathListListener implements OnClickListener {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubString strPath = getApplicationContext().getFilesDir().getAbsolutePath();List<PackageInfo> packageInfoList = getPackageManager().getInstalledPackages(0);Toast.makeText(getApplicationContext(),strPath + ":::" + packageInfoList.toString(),Toast.LENGTH_SHORT).show();}}

更详细信息可以下载

点击打开链接