android doinbackground toast,Android離開doInBackgroundThread而不離開活動？

RD如果我可能會建議一個相當扭曲的方法來處理後臺線程中的錯誤。考慮將調用包裝在後臺線程的try catch中並返回一個有狀態的對象。所以如果你想要後臺線程返回一個字符串，創建一個BoolString類。

//a utility class to signal success or failure, return an error message, and return a useful String value

//see Try Out in C#

public final class BoolString {

public final boolean success;

public final String err;

public final String value;

public BoolString(boolean success, String err, String value){

this.success= success;

this.err= err;

this.value= value;

}

}

用法：

public BoolString tryEncrypt(String inString, String password) {

try {

String value= encrypt(inString, password);

return new BoolString(true,"",value);

}

catch (GeneralSecurityException e){

return new BoolString(false,e.getMessage(),"");

}

}

protected void onPostExecute(BoolString result){

progress.dismiss();

if (result.success){

result.value;

}

else {

result.err;

}

}