无法从按钮动作侦听器启动活动？

发布于 2024-12-11 17:56:21 字数 488 浏览 0 评论 0原文

我尝试启动一个 Activity，但它给了我错误消息：The method startActivity(Intent) is undefined for the type new View.onClickListener(){}

这是我使用 startActivity 的代码。

        place.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // TODO If placeButton was clicked:
            Intent placepin = new Intent("my.locations.oskar.mendel.PLACEPINACTIVITY");
            startActivity(placepin);
        }
    });

原文

I tried to start an activity but it gives me the error message: The method startActivity(Intent) is undefined for the type new View.onClickListener(){}

Here is the code i used the startActivity in.

        place.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // TODO If placeButton was clicked:
            Intent placepin = new Intent("my.locations.oskar.mendel.PLACEPINACTIVITY");
            startActivity(placepin);
        }
    });

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神魇的王 2024-12-18 17:56:21

OnClickListener 是 Activity 类中的一个对象。在 onClick 代码块中，Activity 的继承方法对 OnClickListener 对象不可见，因此您需要相应地调整范围。你可能想要这样的东西：

        place.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // TODO If placeButton was clicked:
            Intent placepin = new Intent("my.locations.oskar.mendel.PLACEPINACTIVITY");
            ActivityClassName.this.startActivity(placepin);
        }

The OnClickListener is an object within your Activity class. Within the onClick codeblock, the Activity's inherited methods are not going to be visible to the OnClickListener object, hence you will need to adjust the scope accordingly. You likely want something like this:

        place.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // TODO If placeButton was clicked:
            Intent placepin = new Intent("my.locations.oskar.mendel.PLACEPINACTIVITY");
            ActivityClassName.this.startActivity(placepin);
        }

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苏璃陌 2024-12-18 17:56:21

我解决这个问题的方法是使用布尔值。

boolean start = false;

.
.
.
buttonListener{
   ....
   start = true;
   ...
   displayFriend(start);
}

public void displayFriend(boolean start){
  Intent intent = new Intent(this, xxActivity.class);
  startActvity(intent);
}

希望这对你有帮助。

My method into solving this problem is use boolean value.

boolean start = false;

.
.
.
buttonListener{
   ....
   start = true;
   ...
   displayFriend(start);
}

public void displayFriend(boolean start){
  Intent intent = new Intent(this, xxActivity.class);
  startActvity(intent);
}

hopefully that helps you.

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