Android TextView 消息显示的 If 语句

Question

如何为 Android setText() 命令创建 if 语句？

例如，如果我有这样的东西：

Button button = (Button) findViewById(R.id.button);
TextView messageBox = (TextView)findViewById(R.id.message);
phrase[0] = "Hello World!";  //
phrase[1] = "Toast";         // array is declared earlier in code
Random r = new Random();
int  n = r.nextInt(1);
messageBox.setText(phrase[n]);

if(/*condition when phrase[1] is displayed in messageBox*/){
   // do stuff
}

我的想法是，我想构造一个 if 语句来监视何时在我的 messageBox 对象中显示特定消息。

Answer 1

试试这个：

 Button button = (Button) findViewById(R.id.button);
    TextView messageBox = (TextView)findViewById(R.id.message);
    phrase[0] = "Hello World!";  //
    phrase[1] = "Toast";         // array is declared earlier in code
    Random r = new Random();
    int  n = r.nextInt(1);
    messageBox.setText(phrase[0]);

    if(messageBox.getText().toString().equals("Toast")){
       // do stuff
    }

Answer 2

试试这个：

if(phrase[n].equals(messageBox.getText().toString())){

}

Answer 3

这样做：

Button button = (Button) findViewById(R.id.button);
TextView messageBox = (TextView) findViewById(R.id.message);
phrase[0] = "Hello World!";
phrase[1] = "Toast";
Random r = new Random();
int n = r.nextInt(1);
messageBox.setText(phrase[0]);

if(messageBox.getText().toString().equals("Toast")){
   //Write your code here when the result is Toast
} else {
   //Write your code here when the result is Hello World!
}

Android TextView 消息显示的 If 语句

If Statement for Android TextView Message Display

java

android

if-statement

textview

settext