Android Manager

Love The Way You Lie 2022-07-16 11:50 117阅读 0赞

## AssetManager ##

assets资源目录中的文件只能读不能写

AssetManager assets = getAssets();
    InputStream in = assets.open("filename");

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    
        //1. 获取到assert 目录下的db 文件
        AssetManager assetManager = getAssets();
        InputStream is = assetManager.open("myuser.db");
        //将文件拷贝到
        /data / data / com.itheima.android.asserts.sqlite / databases / myuser.db
        //如果databases 目录不存在则创建
        File file = new File("/data/data/com.itheima.android.asserts.sqlite/databases");
        if (!file.exists()) {
            file.mkdirs();
        }
        FileOutputStream fos = new FileOutputStream(new File(file, "myuser.db"));
        byte[] buff = new byte[1024 * 8];
        int len = -1;
        while ((len = is.read(buff)) != -1) {
            fos.write(buff, 0, len);
        }
    
        fos.close();
        is.close();
        //访问数据库
        SQLiteDatabase database = openOrCreateDatabase("myuser.db", MODE_PRIVATE,
                null);
        String sql = "select c_name from t_user";
        Cursor cursor = database.rawQuery(sql, null);
        while (cursor.moveToNext()) {
            String string = cursor.getString(0);
            Log.d("tag", string);
        }
    
        cursor.close();
        database.close();
    }

## SmsManager ##

SmsManager manager = SmsManager.getDefault();
    ArrayList<String> messages = manager.divideMessage("message");
    manager.sendMultipartTextMessage("18801911161",null,messages,null,null);
    for (String message : messages){
        manager.sendTextMessage("18801911161",null,message,null,null);
    }
    
    Object[] objects = (Object[]) intent.getExtras().get("pdus");
    for (Object obj : objects){
        SmsMessage sms = SmsMessage.createFromPdu((byte[]) obj);
        String address = sms.getOriginatingAddress();//来电号码
        String body = sms.getMessageBody();//短信内容
    }

## FragmentManager ##

## TelephoneManager ##

## WindowManager ##

## **flags** ##

<table> 
 <thead> 
  <tr> 
   <th>flag</th> 
   <th>说明</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>FLAG_NOT_TOUCH_MODAL</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>FLAG_NOT_FOCUSABLE</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>FLAG_SHOW_WHEN_LOCKED</td> 
   <td></td> 
  </tr> 
 </tbody> 
</table>

### **type** ###

<table> 
 <thead> 
  <tr> 
   <th>flag</th> 
   <th>说明</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>TYPE_SYSTEM_OVERLAY</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td>TYPE_SYSTEM_ERROR</td> 
   <td></td> 
  </tr> 
 </tbody> 
</table>

Window window = getWindow();
    WindowManager.LayoutParams layoutParams = window.getAttributes();
    window.setAttributes(layoutParams);
    
    WindowManager manager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
    WindowManager.LayoutParams params = new WindowManager.LayoutParams();
    params.flags |= WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;// 焦点
    params.height = WindowManager.LayoutParams.WRAP_CONTENT;
    params.width = WindowManager.LayoutParams.WRAP_CONTENT;
    params.format = PixelFormat.TRANSLUCENT;
    manager.addView(view,params);
    manager.removeView(view);
    manager.updateViewLayout(view,params);

### Window ###

PhoneWindow

## NotificationManager ##

## WifiManager ##

WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
    WifiInfo info = wifi.getConnectionInfo();
    String macAddress = info.getMacAddress();

## DevicePolicyManager ##

## PackageManager ##

PackageManager pm = getPackageManager();
    pm.getLaunchIntentForPackage("packageName");
    PackageInfo packageInfo = pm.getPackageInfo(getPackageName(), 0);
    String versionName = packageInfo.versionName;
    int versionCode = packageInfo.versionCode;
    List<PackageInfo> installedPackages = pm.getInstalledPackages(0);

## LayoutManager ##

## ActivityManager ##

getRunningAppProcesses()  
killBackgroundProcesses()  
getRunningServices()  
getRunningTasks()  
getMemoryInfo()  
getMemoryClass() 获取分配的内存大小  
getLargeMemoryClass() 获取分配的最大内存

//进程管理器/任务管理器
    ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
    manager.getRunningAppProcesses();
    manager.killBackgroundProcesses("packageName");
    manager.getRunningServices(50);
    List<ActivityManager.RunningTaskInfo> tasks = manager.getRunningTasks();
    ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo();
    manager.getMemoryInfo(memoryInfo);
    
    int memory = manager.getMemoryClass();
    int largeMemory = manager.getLargeMemoryClass();

## ConnectivityManager ##

ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context  
.CONNECTIVITY\_SERVICE);  
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();  
boolean isConnected = activeNetwork != null && activeNetwork.isConnectedOrConnecting();  
boolean isWiFi = activeNetwork.getType() == ConnectivityManager.TYPE\_WIFI;

### 监听网络连接变化 ###

## LocalBroadcastManager ##

## PowerManager ##

## AlarmManager ##

设置定时任务

## StorageManager ##

## BatteryManager ##

EXTRA\_STATUS 充电状态  
BATTERY\_STATUS\_CHARGING 正在充电  
BATTERY\_STATUS\_FULL 充满电  
EXTRA\_PLUGGED 充电方式  
BATTERY\_PLUGGED\_USB USB充电  
BATTERY\_PLUGGED\_AC 交流充电器充电  
EXTRA\_LEVEL  
EXTRA\_SCALE

ACTION\_BATTERY\_CHANGED 电量改变广播  
ACTION\_POWER\_CONNECTED 连接设备  
ACTION\_POWER\_DISCONNECTED 断开连接  
ACTION\_BATTERY\_LOW 低电量  
ACTION\_BATTERY\_OKAY 离开低电量

### **判断当前充电状态** ###

IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
    Intent batteryStatus = registerReceiver(null, ifilter);
    //获取充电状态
    int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
    boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||
            status == BatteryManager.BATTERY_STATUS_FULL;
    //获取充电方式
    int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
    boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
    boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;

### **监测充电状态的改变** ###

17.2.1. 注册receiver

### **获取当前电量** ###

int level = batteryStatus.getIntExtra(BatteryManager.EXTRA\_LEVEL, -1);  
int scale = batteryStatus.getIntExtra(BatteryManager.EXTRA\_SCALE, -1);

float batteryPct = level / (float)scale;

### **监测电量的有效改变** ###

## DownloadManager ##