如何在我的应用程序上为所有手机调用android计算器

Question

  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));

以上仅适用于HTC

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

以上适用于S3

我需要一个适用于所有这些代码的代码.谁有任何线索？请举一个示例代码

Answer 1

你可以尝试calculator在所有Android设备上默认:

ArrayList<HashMap<String,Object>> items =new ArrayList<HashMap<String,Object>>();

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);
 }
}

现在您可以启动计算器应用程序:

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
   }

而对于Api> = 15,您可以使用

Intent intent = new Intent();
intent.setAction(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_APP_CALCULATOR);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);