獲取APK 包的相關信息PackageManager 第一部分

public class test4 extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
//安裝包路徑
        String filePath="sdcard/download/xxxxx.apk";
        PackageManager pm = getPackageManager();
        PackageInfo info = pm.getPackageArchiveInfo(filePath, PackageManager.GET_ACTIVITIES);
        if(info != null){
            ApplicationInfo appInfo = info.applicationInfo;
            String appName = pm.getApplicationLabel(appInfo).toString();
    //得到安裝包名稱
            String packageName = appInfo.packageName;
    //得到版本信息
            String version=info.versionName;
            Toast.makeText(test4.this, "packageName:"+packageName+";version:"+version, Toast.LENGTH_LONG).show();
            Drawable icon = pm.getApplicationIcon(appInfo);//得到圖標信息
            TextView tv = (TextView)findViewById(R.id.tv); //顯示圖標
            tv.setBackgroundDrawable(icon);
        }
    }

}