QRScanner：startActivityForResult引發ActivityNotFound異常

Question

在我的應用程序中，我嘗試調用結果的意圖，但它顯示「未找到活動異常」。

Intent intent = new Intent("com.google.zxing.client.android.SCAN"); 
intent.putExtra("SCAN_MODE", "QR_CODE_MODE"); 
startActivityForResult(intent, 0); 

Answer 1

mayby the scanner is not installed？試試這個：

if (checkpackage(context, "com.google.zxing.client.android")) { 
     ((Activity) c).startActivityForResult(new Intent("com.google.zxing.client.android.SCAN"), 0); 
    } else { 
     Uri marketUri = Uri.parse("market://details?id=com.google.zxing.client.android"); 
     Intent marketIntent = new Intent(Intent.ACTION_VIEW).setData(marketUri); 
     ((Activity) c).startActivity(marketIntent); 
     Toast.makeText(c, "Es ist kein Barcodescanner installiert", Toast.LENGTH_SHORT).show(); 
    } 

public static boolean checkpackage(Context ctx, String PACKAGE_NAME) { 
    try { 
     PackageInfo info = ctx.getPackageManager().getPackageInfo(PACKAGE_NAME, 0); 
     return info != null; 

    } catch (PackageManager.NameNotFoundException e) { 
     return false; 
    } 
}