Android获取手机相关信息

首先，一个小例子：

package com.brio.testid;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.os.Bundle;
import android.provider.Settings.Secure;
import android.widget.TextView;

public class MainActivity extends Activity {
	TextView tvId = null;
	String androidId = null;
	BluetoothAdapter m_BluetoothAdapter = null; // Local Bluetooth adapter

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		androidId = Secure.getString(getContentResolver(), Secure.ANDROID_ID);
		tvId = (TextView) findViewById(R.id.tvId);

		m_BluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
		String m_szBTMAC = m_BluetoothAdapter.getAddress();

		tvId.setText("手机型号: " + android.os.Build.MODEL + ",
SDK版本:"
				+ android.os.Build.VERSION.SDK + ",
系统版本:"
				+ android.os.Build.VERSION.RELEASE + ",
BT MAC:" + m_szBTMAC
				+ ",
AndroidId:" + androidId);
		tvId.setTextSize(30.0f);
	}
}

下面内容转载自：http://blog.csdn.net/way_ping_li/article/details/8314009 学习备用。

一、Android 获取手机中已安装apk文件信息(PackageInfo、ResolveInfo)(应用图片、应用名、包名等)
1、通过PackageManager可获取手机端已安装的apk文件的信息，具体代码如下：

PackageManager packageManager = this.getPackageManager();
List<PackageInfo> packageInfoList = packageManager.getInstalledPackages(0);

通过上述方法，可得到手机中安装的所有应用程序，包括手动安装的apk包的信息、、系统预装的应用软件的信息，要区分这两类软件可使用以下方法:
(a) 从packageInfoList获取的packageInfo，再通过packageInfo.applicationInfo获取applicationInfo。
(b) 判断(applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM)的值，该值大于0时，表示获取的应用为系统预装的应用，反之则为手动安装的应用。
 (1)获取应用的代码:

public static List<PackageInfo> getAllApps(Context context) {
        List<PackageInfo> apps = new ArrayList<PackageInfo>();
        PackageManager pManager = context.getPackageManager();
        // 获取手机内所有应用
        List<PackageInfo> paklist = pManager.getInstalledPackages(0);
        for (int i = 0; i < paklist.size(); i++) {
            PackageInfo pak = (PackageInfo) paklist.get(i);
            // 判断是否为非系统预装的应用程序
            if ((pak.applicationInfo.flags & pak.applicationInfo.FLAG_SYSTEM) <= 0) {
                apps.add(pak);
            }
        }
        return apps;
    }

(2)、获取图片、应用名、包名(ShareItemInfo 类是自己写的，忽视吧):

PackageManager pManager = MessageSendActivity.this.getPackageManager();
List<PackageInfo> appList  = Utils.getAllApps(MessageSendActivity.this);
for(int i=0;i<appList.size();i++) {
    PackageInfo pinfo = appList.get(i);
    shareItem = new ShareItemInfo();
    shareItem.setIcon(pManager.getApplicationIcon(pinfo.applicationInfo));
    shareItem.setLabel(pManager.getApplicationLabel(pinfo.applicationInfo).toString());
    shareItem.setPackageName(pinfo.applicationInfo.packageName);
}

(3)获取支持分享的应用的代码：

public static List<ResolveInfo> getShareApps(Context context){
    List<ResolveInfo> mApps = new ArrayList<ResolveInfo>();
    Intent intent=new Intent(Intent.ACTION_SEND,null);
    intent.addCategory(Intent.CATEGORY_DEFAULT);
    intent.setType("text/plain");
    PackageManager pManager = context.getPackageManager();
    mApps = pManager.queryIntentActivities(intent,PackageManager.COMPONENT_ENABLED_STATE_DEFAULT);
  return mApps;
}

由于该方法，返回的并不是PackageInfo 对象。而是ResolveInfo。因此获取图片、应用名、包名的方法不一样，如下：

PackageManager pManager = MessageSendActivity.this.getPackageManager();
List<ResolveInfo> resolveList  = Utils.getShareApps(MessageSendActivity.this);
for(int i=0;i<resolveList.size();i++) {
    ResolveInfo resolve = resolveList.get(i);
    ShareItemInfo shareItem = new ShareItemInfo();
    //set Icon
    shareItem.setIcon(resolve.loadIcon(pManager));
    //set Application Name
    shareItem.setLabel(resolve.loadLabel(pManager).toString());
    //set Package Name
    shareItem.setPackageName(resolve.activityInfo.packageName);
}

总结：
通过 PackageInfo 获取具体信息方法：
包名获取方法：packageInfo.packageName
icon获取获取方法：packageManager.getApplicationIcon(applicationInfo)
应用名称获取方法：packageManager.getApplicationLabel(applicationInfo)
使用权限获取方法：packageManager.getPackageInfo(packageName,PackageManager.GET_PERMISSIONS)
.requestedPermissions
通过 ResolveInfo 获取具体信息方法：
包名获取方法：resolve.activityInfo.packageName
icon获取获取方法：resolve.loadIcon(packageManager)
应用名称获取方法：resolve.loadLabel(packageManager).toString()

 

二、获取手机可用内存和总内存(手机的内存信息主要在/proc/meminfo文件中，其中第一行是总内存，而剩余内存可通过ActivityManager.MemoryInfo得到)：

private String[] getTotalMemory() {
            String[] result = {"",""};  //1-total 2-avail
            ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
            mActivityManager.getMemoryInfo(mi);
            long mTotalMem = 0;
            long mAvailMem = mi.availMem;
            String str1 = "/proc/meminfo";
            String str2;
            String[] arrayOfString;
            try {
                FileReader localFileReader = new FileReader(str1);
                BufferedReader localBufferedReader = new BufferedReader(localFileReader, 8192);
                str2 = localBufferedReader.readLine();
                arrayOfString = str2.split("\s+");
                mTotalMem = Integer.valueOf(arrayOfString[1]).intValue() * 1024;
                localBufferedReader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            result[0] = Formatter.formatFileSize(this, mTotalMem);
            result[1] = Formatter.formatFileSize(this, mAvailMem);
            Log.i(TAG, "meminfo total:" + result[0] + " used:" + result[1]);
            return result;
    }

三、获取手机CPU信息(和内存信息同理，cpu信息可通过读取/proc/cpuinfo文件来得到，其中第一行为cpu型号，第二行为cpu频率):

private String[] getCpuInfo() {
             String str1 = "/proc/cpuinfo";
             String str2 = "";
             String[] cpuInfo = {"", ""};  //1-cpu型号  //2-cpu频率
             String[] arrayOfString;
             try {
                 FileReader fr = new FileReader(str1);
                 BufferedReader localBufferedReader = new BufferedReader(fr, 8192);
                 str2 = localBufferedReader.readLine();
                 arrayOfString = str2.split("\s+");
                 for (int i = 2; i < arrayOfString.length; i++) {
                     cpuInfo[0] = cpuInfo[0] + arrayOfString[i] + " ";
                 }
                 str2 = localBufferedReader.readLine();
                 arrayOfString = str2.split("\s+");
                 cpuInfo[1] += arrayOfString[2];
                 localBufferedReader.close();
             } catch (IOException e) {
             }
             Log.i(TAG, "cpuinfo:" + cpuInfo[0] + " " + cpuInfo[1]);
             return cpuInfo;
         }

 

四、获取手机MAC地址：

private String getMacAddress(){
         String result = "";
         WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
         WifiInfo wifiInfo = wifiManager.getConnectionInfo();
         result = wifiInfo.getMacAddress();
         Log.i(TAG, "macAdd:" + result);
         return result;
 }

 五、获取屏幕密度三种方法：

// 获取屏幕密度（方法1）
int screenWidth  = getWindowManager().getDefaultDisplay().getWidth();       // 屏幕宽（像素，如：480px）
int screenHeight = getWindowManager().getDefaultDisplay().getHeight();      // 屏幕高（像素，如：800p）

Log.e(TAG + "  getDefaultDisplay", "screenWidth=" + screenWidth + "; screenHeight=" + screenHeight);


// 获取屏幕密度（方法2）
DisplayMetrics dm = new DisplayMetrics();
dm = getResources().getDisplayMetrics();

float density  = dm.density;        // 屏幕密度（像素比例：0.75/1.0/1.5/2.0）
int densityDPI = dm.densityDpi;     // 屏幕密度（每寸像素：120/160/240/320）
float xdpi = dm.xdpi;
float ydpi = dm.ydpi;

Log.e(TAG + "  DisplayMetrics", "xdpi=" + xdpi + "; ydpi=" + ydpi);
Log.e(TAG + "  DisplayMetrics", "density=" + density + "; densityDPI=" + densityDPI);

screenWidth  = dm.widthPixels;      // 屏幕宽（像素，如：480px）
screenHeight = dm.heightPixels;     // 屏幕高（像素，如：800px）

Log.e(TAG + "  DisplayMetrics(111)", "screenWidth=" + screenWidth + "; screenHeight=" + screenHeight);



// 获取屏幕密度（方法3）
dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);

density  = dm.density;      // 屏幕密度（像素比例：0.75/1.0/1.5/2.0）
densityDPI = dm.densityDpi;     // 屏幕密度（每寸像素：120/160/240/320）
xdpi = dm.xdpi;
ydpi = dm.ydpi;

Log.e(TAG + "  DisplayMetrics", "xdpi=" + xdpi + "; ydpi=" + ydpi);
Log.e(TAG + "  DisplayMetrics", "density=" + density + "; densityDPI=" + densityDPI);

int screenWidthDip = dm.widthPixels;        // 屏幕宽（dip，如：320dip）
int screenHeightDip = dm.heightPixels;      // 屏幕宽（dip，如：533dip）

Log.e(TAG + "  DisplayMetrics(222)", "screenWidthDip=" + screenWidthDip + "; screenHeightDip=" + screenHeightDip);

screenWidth  = (int)(dm.widthPixels * density + 0.5f);      // 屏幕宽（px，如：480px）
screenHeight = (int)(dm.heightPixels * density + 0.5f);     // 屏幕高（px，如：800px）

Log.e(TAG + "  DisplayMetrics(222)", "screenWidth=" + screenWidth + "; screenHeight=" + screenHeight);

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