java - Android - 如何声明 'this' 的变量？

Question

public class MainActivity extends AppCompatActivity {

  //the problem is here
  private class this_Variable=this;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);


  }

  public void quitGame(View v){
    this_Variable.finishAffinity();
  }

}

正如您所看到的上面的代码，我想将“this”分配给一个名为“this_variable”的变量。

我尝试了上面的代码，但它不起作用。

Answer 1

刚刚解决了新手问题...用 MainActivity 替换类。

public class MainActivity extends AppCompatActivity {

  //the problem is here
  private MainActivity this_Variable=this;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);


  }

  public void quitGame(View v){
    this_Variable.finishAffinity();
  }

}

或者只是

public void quitGame(View v){
  MainActivity.this.finishAffinity();
}