Android中PROXIMITY_SCREEN_OFF_WAKE_LOCK的帮助

如果锁定屏幕不安全，您可以使用：来解除锁定屏幕

getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);

你可以在创建时调用它来防止锁定屏幕出现，也可以在需要的时候调用它

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

这似乎不会干扰接近锁。

我使用这个代码

import android.content.Context;
import android.os.PowerManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
    private PowerManager mPowerManager;
    private PowerManager.WakeLock mWakeLock;
    private static final String TAG = "MainActivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mPowerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);
    }
    public void activateSensor(View v) {
        Toast.makeText(MainActivity.this, "Proximity On", Toast.LENGTH_LONG).show();
        if (mWakeLock == null) {
            mWakeLock = mPowerManager.newWakeLock(PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK, "incall");
        }
        if (!mWakeLock.isHeld()) {
            Log.d(TAG, "New call active : acquiring incall (CPU only) wake lock");
            mWakeLock.acquire();
        } else {
            Log.d(TAG, "New call active while incall (CPU only) wake lock already active");
        }
    }
    public void deactivateSensor(View v) {
        Toast.makeText(MainActivity.this, "Proximity Off", Toast.LENGTH_LONG).show();
        if (mWakeLock != null && mWakeLock.isHeld()) {
            mWakeLock.release();
            Log.d(TAG, "Last call ended: releasing incall (CPU only) wake lock");
        } else {
            Log.d(TAG, "Last call ended: no incall (CPU only) wake lock were held");
        }
    }
}

清单中：

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

在我的布局中：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.proximitysensor.MainActivity">
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/activity_main_turn_on_screen"
        android:onClick="activateSensor"
        android:text="@string/activity_main_activate_sensor" />
    <Button
        android:id="@+id/activity_main_turn_on_screen"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:onClick="deactivateSensor"
        android:text="@string/activity_main_deactivate_sensor" />
</RelativeLayout>

除了PowerManager的wakeLock之外，您还必须创建这样的KeyGuard锁：

private WakeLock mWakeLock = null;
private KeyguardLock mKeyguardLock = null;
public void enableProximitySensor() {
  PowerManager pm = (PowerManager) getApplicationContext().getSystemService(Context.POWER_SERVICE);
  mWakeLock = pm.newWakeLock(PROXIMITY_SCREEN_OFF_WAKE_LOCK, LOG_TAG);
  mWakeLock.acquire();
  KeyguardManager km = (KeyguardManager) getApplicationContext().getSystemService(Context.KEYGUARD_SERVICE);
  mKeyguardLock = mManager.newKeyguardLock( KEYGUARD_TAG );
}
public void disableProximitySensor() {
  if ( null != mWakeLock ) {
    mWakeLock.release();
    mWakeLock = null;
  }
  if ( null != mKeyguardLock ) {
    mKeyguardLock.disableKeyguard();
    mKeyguardLock = null;
  }
}

仅在获得接近唤醒锁定的同时创建此锁定，锁定屏幕将在应用程序中的其他时间工作。

如果使用mProximityWakeLock.release();，请尝试使用mProximityWakeLock.release(1);

API引用也是隐藏的，但您可以查看源代码：http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/2.1_r2/android/os/PowerManager.java#PowerManager.WakeLock.release%28int%29

你是如何打开屏幕的？当传感器被覆盖时，我设法关闭了屏幕，使用：

WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.buttonBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_OFF;
lp.screenBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_OFF;
etWindow().setAttributes(lp);

之后，从传感器上"释放"或"重新设置"盖子，将不会执行代码的另一部分：

WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.buttonBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_NONE;
lp.screenBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_NONE;
etWindow().setAttributes(lp);

如果它适合您的应用程序，您可以使用

getWindow().addFlags(LayoutParams.FLAG_SHOW_WHEN_LOCKED | LayoutParams.FLAG_IGNORE_CHEEK_PRESSES);