安卓工作室 : Back Button for previous Activity

Question

我创建了一个带有 Navigation Drawer 的 Activity 并将选项图标(位于右上角)替换为 ImageButton 处理后退点击。

问题是，我不知道该怎么做。我对如何使用后退按钮有点困惑。我应该执行什么代码才能转到上一个 Activity？

后退按钮用于: Activity 到另一个 Activity 和 MainActivity 到 Fragment Activity 。

这是我的 list 代码:

   <activity
        android:name="com.teamamazing.with_sidebar.activity.Accomodation"
        android:label="Accomodation"
        android:parentActivityName="com.teamamazing.with_sidebar.activity.SpecialPage">
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value="com.teamamazing.with_sidebar.activity.SpecialPage" />
    </activity>

这是我的住宿 Activity :

package com.teamamazing.with_sidebar.activity;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import com.teamamazing.with_sidebar.R;


public class Accomodation extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_accomodation);
  } }

这是我的 SpecialPage 代码:，它将成为父 Activity 。

package com.teamamazing.with_sidebar.activity;


import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import com.teamamazing.with_sidebar.R;


public class SpecialPage extends AppCompatActivity {

public ImageButton accomodation;


public void init() {
    accomodation = (ImageButton) findViewById(R.id.AccomodationButton);
    accomodation.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {

            Intent accomodation = new Intent(SpecialPage.this, Accomodation.class);

            startActivity(accomodation);


        }
    });
}


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_special_page);

    init();
}}

谢谢你的回答。

Answer 1

您可以使用onBackPressed() 或finish() 方法。

  buttonClickOBJ.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {

       onBackPressed();

    }
});

onBackPressed ()

Called when the activity has detected the user's press of the back key. The default implementation simply finishes the current activity, but you can override this to do whatever you want.