haohaozaici

public static String humanReadableByteCount(long bytes, boolean si) {
    int unit = si ? 1000 : 1024;
    if (bytes < unit) return bytes + " B";
    int exp = (int) (Math.log(bytes) / Math.log(unit));
    String pre = (si ? "kMGTPE" : "KMGTPE").charAt(exp-1) + (si ? "" : "i");
    return String.format("%.1f %sB", bytes / Math.pow(unit, exp), pre);
}

//example outputs
                              SI     BINARY

haohaozaici

private final static char[] hexArray = "0123456789ABCDEF".toCharArray();
public static String bytesToHex(byte[] bytes) {
    char[] hexChars = new char[bytes.length * 2];
    for ( int j = 0; j < bytes.length; j++ ) {
        int v = bytes[j] & 0xFF;
        hexChars[j * 2] = hexArray[v >>> 4];
        hexChars[j * 2 + 1] = hexArray[v & 0x0F];
    }
    return new String(hexChars);
}

haohaozaici

/**
 * 用AudioManager获取音频焦点避免音视频声音重叠问题
 */
public class AudioFocusManager {

    private static final String TAG = "AudioFocusManager";

    private Context mContext;
    private AudioManager mAudioManager;
    private AudioManager.OnAudioFocusChangeListener mAudioFocusChangeListener;

haohaozaici

package fi.veetipaananen.android.disableflagsecure;

import android.os.Build;
import android.view.SurfaceView;
import android.view.Window;
import android.view.WindowManager;

import de.robv.android.xposed.IXposedHookLoadPackage;
import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.XposedHelpers;

haohaozaici

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.os.Build;
import android.provider.Settings;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import android.view.OrientationEventListener;
import android.view.Surface;

haohaozaici

// 饿汉式
class Singleton {
    private static final Singleton ourInstance = new Singleton();

    static Singleton getInstance() {
        return ourInstance;
    }

    private Singleton() {
    }