Turn Off Screen on Android

Turn off screen on Android

There are two choices for turning the screen off:

PowerManager manager = (PowerManager) getSystemService(Context.POWER_SERVICE);

// Choice 1
manager.goToSleep(int amountOfTime);

// Choice 2
PowerManager.WakeLock wl = manager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "Your Tag");
wl.acquire();
wl.release();

You will probably need this permission too:

<uses-permission android:name="android.permission.WAKE_LOCK" />

UPDATE:

Try this method; android turns off the screen once the light level is low enough.

WindowManager.LayoutParams params = getWindow().getAttributes();
params.flags |= LayoutParams.FLAG_KEEP_SCREEN_ON;
params.screenBrightness = 0;
getWindow().setAttributes(params);

android: turn screen Off

You can achieve it by setting the wake_setting time to 1 second.

I have already tried both of above shared ways, which shows slightly visible screen on but by setting wake_setting to 1 sec.

I have to just turn off the screen. For that purpose you are going to add SETTING_Change permission ( only available in rooted handset).

Turn off screen programmatically when face is close the screen on Android

I found solution by disassembling one very famous VoIP application. This activity after pressing button1 will disable screen and hardware keys when you close sensors. After pressing button2 this function will be switched off.

Also, this function required permission:

<uses-permission android:name="android.permission.WAKE_LOCK" />

Activity. Try it.

public class MainActivity extends Activity {

    private Button button1;
    private Button button2;
    private PowerManager powerManager;
    private PowerManager.WakeLock wakeLock;
    private int field = 0x00000020;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        try {
            // Yeah, this is hidden field.
            field = PowerManager.class.getClass().getField("PROXIMITY_SCREEN_OFF_WAKE_LOCK").getInt(null);
        } catch (Throwable ignored) {
        }

        powerManager = (PowerManager) getSystemService(POWER_SERVICE);
        wakeLock = powerManager.newWakeLock(field, getLocalClassName());

        setContentView(R.layout.main);
        button1 = (Button) findViewById(R.id.button1);
        button2 = (Button) findViewById(R.id.button2);

        button1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                if(!wakeLock.isHeld()) {
                    wakeLock.acquire();
                }
            }
        });

        button2.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                if(wakeLock.isHeld()) {
                    wakeLock.release();
                }
            }
        });
    }
}

Could adb command disable/turn off a display screen of android phone while it is still working as normal?

As I found that there is no adb command for this.
Fortunately, thanks for guideline of scrcpy developer (@rom1v), I have successfully made it work with java code in instead.
https://github.com/Genymobile/scrcpy/issues/2888

Demo video: https://www.youtube.com/watch?v=uMXGYrTn11E

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