Android常用代码段

出处：http://mp.weixin.qq.com/s?__biz=MzA4NjQxMjA5OA==&mid=401797794&idx=2&sn=a0a47cea6f60414a38c34bed25fbd3ad&scene=23&srci

1.拨打电话：

public static void call(Context context,String phoneNumber){  
        context.startActivity(new Intent(Intent.ACTION_CALL,Uri.parse("tel:"+phoneNumber)));  
    } 

2.进入拨号界面

public static void callDial(Context context,String phoneNumber){
        context.startActivity(new Intent(Intent.ACTION_DIAL,Uri.parse("tel:"+phoneNumber)));
    }

3.发送短信

public static void sendSms(Context context,String phoneNumber,
            String content){
        Uri uri=Uri.parse("smsto:"
                +(TextUtils.isEmpty(phoneNumber)?"":phoneNumber));
        Intent intent=new Intent(Intent.ACTION_SENDTO,uri);
        intent.putExtra("sms_body",TextUtils.isEmpty(content)?"":content);
        context.startActivity(intent);
    }

4.唤醒屏幕并解锁

public static void wakeUpAndUnlock(Context context){  
        KeyguardManager km=(KeyguardManager)context.getSystemService(Context.KEYGUARD_SERVICE);  
        KeyguardManager.KeyguardLock kl=km.newKeyguardLock("unLock");  
        //解锁  
        kl.disableKeyguard();  
        //获取电源管理器对象  
        PowerManager pm=(PowerManager)context.getSystemService(Context.POWER_SERVICE);  
        //获取PowerManager.WakeLock对象,后面的参数|表示同时传入两个值,最后的是LogCat里用的Tag  
        PowerManager.WakeLock wl=pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP|PowerManager.SCREEN_DIM_WAKE_LOCK,"bright");  
        //点亮屏幕  
        wl.acquire();  
        //释放  
        wl.release();  
    }

5.需要添加权限

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

6.判断当前App处于前台还是后台状态

public static boolean isApplicationBackground(finalContext context){
        ActivityManager am=(ActivityManager)context
                .getSystemService(Context.ACTIVITY_SERVICE);
        @SuppressWarnings("deprecation")
        List<ActivityManager.RunningTaskInfo>tasks=am.getRunningTasks(1);
        if(!tasks.isEmpty()){
            ComponentName topActivity=tasks.get(0).topActivity;
            if(!topActivity.getPackageName().equals(context.getPackageName())){
                return true;
            }
        }
        return false;
    }

7.需要添加权限

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

8.判断当前手机是否处于锁屏(睡眠)状态

public static boolean isSleeping(Context context){
        KeyguardManager kgMgr=(KeyguardManager)context
                .getSystemService(Context.KEYGUARD_SERVICE);
        boolean isSleeping=kgMgr.inKeyguardRestrictedInputMode();
        return isSleeping;
    }

9.判断当前是否有网络连接

public static boolean isOnline(Context context){
        ConnectivityManager manager=(ConnectivityManager)context
                .getSystemService(Activity.CONNECTIVITY_SERVICE);
        NetworkInfo info=manager.getActiveNetworkInfo();
        if(info!=null&&info.isConnected()){
            return true;
        }
        return false;
    }

10.判断当前是否是WIFI连接状态

public static boolean isOnline(Context context){
        ConnectivityManager manager=(ConnectivityManager)context
                .getSystemService(Activity.CONNECTIVITY_SERVICE);
        NetworkInfo info=manager.getActiveNetworkInfo();
        if(info!=null&&info.isConnected()){
            return true;
        }
        return false;
    }

11.安装APK

public static void installApk(Context context,File file){
        Intent intent=newIntent();
        intent.setAction("android.intent.action.VIEW");
        intent.addCategory("android.intent.category.DEFAULT");
        intent.setType("application/vnd.android.package-archive");
        intent.setDataAndType(Uri.fromFile(file),
                "application/vnd.android.package-archive");
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(intent);
    }

12.判断当前设备是否为手机

public static boolean isPhone(Context context){
        TelephonyManager telephony=(TelephonyManager)context
                .getSystemService(Context.TELEPHONY_SERVICE);
        if(telephony.getPhoneType()==TelephonyManager.PHONE_TYPE_NONE){
            return false;
        }else{
            return true;
        }
    }

13.获取当前设备宽高，单位px

 @SuppressWarnings("deprecation")
    public static int getDeviceWidth(Context context){
        WindowManager manager=(WindowManager)context
                .getSystemService(Context.WINDOW_SERVICE);
        return manager.getDefaultDisplay().getWidth();
    }
 
    @SuppressWarnings("deprecation")
    public static int getDeviceHeight(Context context){
        WindowManager manager=(WindowManager)context
                .getSystemService(Context.WINDOW_SERVICE);
        return manager.getDefaultDisplay().getHeight();
    }

14.获取当前设备的IMEI，需要与上面的isPhone()一起使用

@TargetApi(Build.VERSION_CODES.CUPCAKE)
    public static String getDeviceIMEI(Context context){
        String deviceId;
        if(isPhone(context)){
            TelephonyManager telephony=(TelephonyManager)context
                    .getSystemService(Context.TELEPHONY_SERVICE);
            deviceId=telephony.getDeviceId();
        }else{
            deviceId=Settings.Secure.getString(context.getContentResolver(),
                    Settings.Secure.ANDROID_ID);
 
        }
        return deviceId;
    }

15.获取当前设备的MAC地址

public static String getMacAddress(Context context){
        String macAddress;
        WifiManager wifi=(WifiManager)context
                .getSystemService(Context.WIFI_SERVICE);
        WifiInfo info=wifi.getConnectionInfo();
        macAddress=info.getMacAddress();
        if(null==macAddress){
            return "";
        }
        macAddress=macAddress.replace(":","");
        return macAddress;
    }

16.获取当前程序的版本号

public static String getAppVersion(Context context) {
        String version = "0";
        try {
            version = context.getPackageManager().getPackageInfo(
                    context.getPackageName(), 0).versionName;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return version;
    }