要在Android中开启WakeLock,可以按照以下步骤进行:
private PowerManager.WakeLock wakeLock;
private PowerManager powerManager;
powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);
wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MyApp:WakeLockTag");
wakeLock.acquire();
wakeLock.release();
完整的示例代码如下所示:
import android.os.Bundle;
import android.os.PowerManager;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
private PowerManager.WakeLock wakeLock;
private PowerManager powerManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 初始化PowerManager
powerManager = (PowerManager) getSystemService(POWER_SERVICE);
// 获取WakeLock
wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MyApp:WakeLockTag");
}
@Override
protected void onResume() {
super.onResume();
// 开启WakeLock
wakeLock.acquire();
}
@Override
protected void onPause() {
super.onPause();
// 释放WakeLock
wakeLock.release();
}
}
请注意,开启WakeLock会影响设备的电池寿命。因此,应该在不需要WakeLock时及时释放它,以避免不必要的电池消耗。