如何使用来自其他类Java Android onClick的方法？

Question

有没有办法在button的onClick中调用另一个class的方法

我需要在onClick中调用myClass.myMethod()，但在主界面中说不

我的onClick按钮 安卓:onClick="textToVoice.listenVoice"

我的课，没有结束：

public class TextToVoice extends MainActivity{
public void listenVoice(){
    this.makeVoice();

}
public void downloadVoice(){


}
private void makeVoice(){
    Toast toast = Toast.makeText(getApplicationContext(), this.makeUrl(),
            Toast.LENGTH_SHORT);
    toast.show();
}
private String makeUrl(){
    Editable phstr = super.textVoice.getText();
    String textUrl = phstr.toString();
    if (textUrl.contains(" ")){
        textUrl = textUrl.replace(" ", "+");
    }
    return textUrl;
}
}

主要问题是：

public class MainActivity extends ActionBarActivity {
protected EditText textVoice;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getSupportActionBar().hide();
    setContentView(R.layout.activity_main);
    this.textVoice =
            (EditText) findViewById(R.id.textVoice);
    TextToVoice textToVoice = new TextToVoice();
}
......

Answer 1

将另一个类中的方法声明为public和static，然后可以将其用作 你们班。方法（）

Answer 2

class MainActivity extends Activity {
protected EditText textVoice;
Button button;
TextToVoice textToVoice;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.ln_dialog);
    textVoice = (EditText) findViewById(R.id.textVoice);
    button = (Button) findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            textToVoice = new TextToVoice(MainActivity.this,textVoice.getText().toString());
            textToVoice.listenVoice();
        }
    });

}


public class TextToVoice extends MainActivity {
    String textString;
    Context context;

    public TextToVoice(Context c ,String s) {
        textString = s;
        context = c;
    }

    public void listenVoice() {
        makeVoice();
    }

    public void downloadVoice() {
    }

    public void makeVoice() {
        Toast.makeText(context, makeUrl(), Toast.LENGTH_SHORT).show();
    }

    private String makeUrl() {

        if (textString.contains(" ")) {
            textString = textString.replace(" ", "+");
        }
        return textString;
    }
}

Answer 3

为什么你的TextToVoice类会扩展主要活动。Android按钮需要实现视图。OnClickListener接口。尝试实现上述接口，而不是扩展MainActivity。将类的上下文传递给构造函数并使用指定的方法。看看能不能用