由网友(娇气猫)分享简介：public static final String CALCULATOR_PACKAGE ="com.android.calculator2";public static final String CALCULATOR_CLASS ="com.android.calculator2.Calculator";Int...

  public static final String CALCULATOR_PACKAGE ="com.android.calculator2";
  public static final String CALCULATOR_CLASS ="com.android.calculator2.Calculator";
  Intent intent = new Intent();

    intent.setAction(Intent.ACTION_MAIN);
         intent.addCategory(Intent.CATEGORY_LAUNCHER);
        intent.setComponent(new ComponentName(
         CALCULATOR_PACKAGE,
         CALCULATOR_CLASS));

对于HTC的上述工程唯一

the above works for HTC only

  public static final String CALCULATOR_PACKAGE ="com.sec.android.app.popupcalculator";
  public static final String CALCULATOR_CLASS ="com.sec.android.app.popupcalculator.Calculator";

有关S3上述作品

我需要一个code，它适用于所有的人。有人用任何线索？请举例code

I need a code that works for all of them. Someone with any clue ?Please give an example code

推荐答案

您可以尝试为默认值计算器上的所有Android设备：

you can try as to Default calculator on all android devices:

ArrayList<HashMap<String,Object>> items =new ArrayList<HashMap<String,Object>>();
PackageManager pm;
final PackageManager pm = getPackageManager();
List<PackageInfo> packs = pm.getInstalledPackages(0);  
for (PackageInfo pi : packs) {
if( pi.packageName.toString().toLowerCase().contains("calcul")){
    HashMap<String, Object> map = new HashMap<String, Object>();
    map.put("appName", pi.applicationInfo.loadLabel(pm));
    map.put("packageName", pi.packageName);
    items.add(map);
 }
}

，现在你可以启动计算器应用程序：

and now you can launch calculator application as:

if(items.size()>=1){
String packageName = (String) items.get(0).get("packageName");
Intent i = pm.getLaunchIntentForPackage(packageName);
if (i != null)
  startActivity(i);
} 
else{
      // Application not found
   }