Android判断应用是否存在

Android判断应用是否存在

文章分类:移动开发
通过包名判断
 
 
Java代码 
public boolean checkBrowser(String packageName) { 
    if (packageName == null || "".equals(packageName)) 
        return false; 
    try { 
        ApplicationInfo info = getPackageManager().getApplicationInfo( 
                packageName, PackageManager.GET_UNINSTALLED_PACKAGES); 
        return true; 
    } catch (NameNotFoundException e) { 
        return false; 
    } 
} 
 
 
判断包中的Activity
 
 
Java代码 
Intent intent = new Intent(Intent.ACTION_VIEW); 
intent.setClassName("com.android.settings", //$NON-NLS-1$ 
        "com.android.settings.InstalledAppDetails"); //$NON-NLS-1$ 
intent.putExtra("com.android.settings.ApplicationPkgName", //$NON-NLS-1$ 
        mCurrentPkgName); 
List<ResolveInfo> acts = getPackageManager().queryIntentActivities( 
        intent, 0); 
if (acts.size() > 0) { 
    startActivity(intent); 
} else { 
    Toast.makeText(this, 
            getString(R.string.failed_to_resolve_activity), 
            Toast.LENGTH_SHORT).show(); 
}