Example of Simulating HOME Key Function in Android Programming

This article describes the method of simulating the HOME key function in Android programming. Share it with everyone for reference, as follows:

Create a method similar to QQ's back key that does not destroy the Activity (i.e., does not call Activity.finish(), nor does the system call onDestroy), but similar to pressing the Home key, making the Activity similar to 'pausing' (i.e., only calling onPause, onDestroy).

The code is as follows:

public boolean onKeyDown(int keyCode, KeyEvent event) {
    if(keyCode == KeyEvent.KEYCODE_BACK){
    Intent intent = new Intent(Intent.ACTION_MAIN);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);// Note
    intent.addCategory(Intent.CATEGORY_HOME);
    this.startActivity(intent);
    return true;
  }
  return super.onKeyDown(keyCode, event);
}

Special attention:This line must be added because the default launchMode of Activity is standard. If this mark is not added, a new Activity will be created and placed in the same Task as the current Activity. Below is the description of FLAG_ACTIVITY_NEW_TASK: The FLAG_ACTIVITY_NEW_TASK mark

When the Intent object passed to startActivity() contains the FLAG_ACTIVITY_NEW_TASK flag, the system will look for a task different from the current activity to start. If the affinity attribute of the activity to be started is different from the affinity attribute of all the tasks currently, the system will create a new task with that affinity attribute and place the activity to be started in the stack of the newly created task; otherwise, the activity will be placed in the stack with the same affinity attribute.

Readers who are interested in more about Android-related content can check the special topics on this site: 'Android Development Tutorial for Beginners and Advanced Users', 'Summary of Android Debugging Techniques and Common Problem Solving Methods', 'Summary of Android Multimedia Operation Techniques (audio, video, recording, etc.)', 'Summary of Android Basic Component Usage', 'Summary of Android View View Techniques', 'Summary of Android Layout Layout Techniques', and 'Summary of Android Widget Usage'.

Hoping the description in this article will be helpful to everyone's Android program design.

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