非IF / ElSE的版本適用於SDK Build版本

Question

我使用此簡單的條件檢查來顯示Toast，但未顯示任何內容：

 public void ShowVersion(){

         //This works So I am sure the method is called:
         //Toast.makeText(this,"Method is called",Toast.LENGTH_LONG).show();

        if (Build.VERSION.SDK_INT >= 23) {
            Toast.makeText(this,"Version Supported",Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(this,"Version not supported",Toast.LENGTH_LONG).show();
        }
    }

如果和其他都不起作用怎么可能？

Answer 1

主要問題是IF塊內部的異常。 異常中斷IF / ELSE塊。 try/catch塊可以幫助檢測類似情況下的問題。

Answer 2

嘗試這個：

public void ShowVersion(){

     //This works So I am sure the method is called:
     //Toast.makeText(this,"Method is called",Toast.LENGTH_LONG).show();

    if (android.os.Build.VERSION.SDK_INT>=11) {
        Toast.makeText(this,"Version Supported",Toast.LENGTH_LONG).show();
    } else {
        Toast.makeText(this,"Version not supported",Toast.LENGTH_LONG).show();
    }
}

或者更優雅的方式是：

public void ShowVersion(){

     //This works So I am sure the method is called:
     //Toast.makeText(this,"Method is called",Toast.LENGTH_LONG).show();

    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        Toast.makeText(this,"Version Supported",Toast.LENGTH_LONG).show();
    } else {
        Toast.makeText(this,"Version not supported",Toast.LENGTH_LONG).show();
    }
}