java - Android 粘性沉浸模式

Question

所以我有一个 Activity ，我希望它全屏显示，显示标题栏和系统按钮(后退、最小化...)。我确实从developers.android.com获取了一段代码，它确实会全屏显示，但是当我按下屏幕时，标题会弹出，按钮也会出现，我希望它仅在我向上/向下滑动手指时才弹出在屏幕的顶部/底部。

我的 Activity 如下:

package com.example.nsomething.main;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import com.example.nsomething.R;

public class Report extends Activity {

    @TargetApi(Build.VERSION_CODES.KITKAT)
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().getDecorView().setSystemUiVisibility(
                View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                        | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                        | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                        | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                        | View.SYSTEM_UI_FLAG_FULLSCREEN
                        | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
        setContentView(R.layout.report);

        initialize();
    }

    private void initialize() {
        Button report = (Button) findViewById(R.id.button1);
        report.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                startActivity(new Intent(Report.this, Harta.class));
                finish();
            }
        });
    }

}

Answer 1

就像official tutorial处的代码一样，您最好将代码放在onWindowFocusChanged中。

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);

    if (hasFocus) {
        decorView.setSystemUiVisibility(
            View.SYSTEM_UI_FLAG_LAYOUT_STABLE
            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
            | View.SYSTEM_UI_FLAG_FULLSCREEN
            | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
    }
}