【Android】Android工具函數整理

import android.app.Activity;
import android.app.ActivityManager;
import android.app.KeyguardManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.PowerManager;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;

import java.io.File;
import java.util.List;

/**
 * Created by chad on 11/8/2015.
 */
public class MineUtil {

    /**
     * 發送短信
     *
     * @param context
     * @param phoneNumber
     * @param content
     */
    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);
    }

    /**
     * 點亮屏幕然後解鎖,需要權限:android.permission.DISABLE_KEYGUARD,
     * android:name="android.permission.WAKE_LOCK"
     *
     * @param context
     */
    public static void wakeUpAndUnlock(Context context) {
        KeyguardManager km = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
        KeyguardManager.KeyguardLock kl = km.newKeyguardLock("unLock");
        //解鎖
        kl.disableKeyguard();
        //獲取電源管理器對象
        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
        //獲取PowerManager.WakeLock對象,後面的參數|表示同時傳入兩個值,最後的是LogCat裏用的Tag
        PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.SCREEN_DIM_WAKE_LOCK, "bright");
        //點亮屏幕
        wl.acquire();
        //釋放
        wl.release();
    }

    /**
     * 判斷當前程序是否在前臺,需要權限:android:name="android.permission.GET_TASKS"
     *
     * @param context
     * @return
     */
    public static boolean isApplicationBackground(final Context 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;
    }


    /**
     * 有木有鏈接wifi
     *
     * @param context
     * @return
     */
    public static boolean isWifiConnected(Context context) {
        ConnectivityManager connectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo wifiNetworkInfo = connectivityManager
                .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        if (wifiNetworkInfo.isConnected()) {
            return true;
        }
        return false;
    }

    /**
     * 安裝apk
     *
     * @param context
     * @param file
     */
    public static void installApk(Context context, File file) {
        Intent intent = new Intent();
        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);
    }

    /**
     * 根據手機的分辨率從 dp 的單位 轉成爲 px(像素)
     */
    public static int dip2px(Context context, float dpValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }

    /**
     * 根據手機的分辨率從 px 轉成爲 dp
     */
    public static int px2dip(Context context, float pxValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f);
    }

    /**
     * 根據手機的分辨率從 dp 轉成爲 px
     */
    public static int dp2px(Context context, int dp) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp,
                context.getResources().getDisplayMetrics());
    }

    /**
     * 獲取手機屏幕高度
     *
     * @param context
     * @return
     */
    public static int getScreenHeight(Activity context) {
        DisplayMetrics dm = new DisplayMetrics();
        context.getWindowManager().getDefaultDisplay().getMetrics(dm);
        return dm.heightPixels;
    }

    /**
     * 獲取手機屏幕寬度
     *
     * @param context
     * @return
     */
    public static int getScreenWidth(Activity context) {
        DisplayMetrics dm = new DisplayMetrics();
        context.getWindowManager().getDefaultDisplay().getMetrics(dm);
        return dm.widthPixels;
    }

    /**
     * 獲取狀態欄高度
     *
     * @param context
     * @return
     */
    public static int getStatusHeight(Context context) {
        int result = 0;
        int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            result = context.getResources().getDimensionPixelSize(resourceId);
        }
        return result;
    }

    /**
     * 撥打電話,,需要權限:android.permission.CALL_PHONE
     *
     * @param context
     * @param phoneNumber
     */
    public static void call(Context context, String phoneNumber) {
        context.startActivity(new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + phoneNumber)));
    }

    /**
     * 跳轉到撥號界面
     *
     * @param context
     * @param phoneNumber
     */
    public static void callDial(Context context, String phoneNumber) {
        context.startActivity(new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + phoneNumber)));
    }

    /**
     * 隱藏鍵盤
     *
     * @param context
     * @param edit
     */
    public static void hideSoftKeyBoard(Context context, EditText edit) {
        InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(edit.getWindowToken(), 0);
    }

    /**
     * 顯示鍵盤
     *
     * @param context
     * @param edit
     */
    public static void showSoftKeyBoard(Context context, EditText edit) {
        InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.showSoftInput(edit, InputMethodManager.RESULT_SHOWN);
        imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);
    }

    /**
     * 獲取Imei號碼
     * @param context
     * @return
     */
    public static String getIMEI(Context context) {
        String deviceId;
        TelephonyManager telephony = (TelephonyManager) context
                .getSystemService(Context.TELEPHONY_SERVICE);
        deviceId = telephony.getDeviceId();
        return deviceId;
    }

    /**
     * 獲取app的版本號
     * @param context
     * @return
     */
    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;
    }

    /**
     * 當前手機是否處於睡眠狀態
     *
     * @param context
     * @return
     */
    public static boolean isSleeping(Context context) {
        KeyguardManager kgMgr = (KeyguardManager) context
                .getSystemService(Context.KEYGUARD_SERVICE);
        boolean isSleeping = kgMgr.inKeyguardRestrictedInputMode();
        return isSleeping;
    }

    /**
     * 能否聯網
     *
     * @param context
     * @return
     */
    public static boolean isNetAvaliable(Context context) {
        ConnectivityManager manager = (ConnectivityManager) context
                .getSystemService(Activity.CONNECTIVITY_SERVICE);
        NetworkInfo info = manager.getActiveNetworkInfo();
        if (info != null && info.isConnected()) {
            return true;
        }
        return false;
    }


    /**
     * 將px值轉換爲sp值，保證文字大小不變
     *
     * @param pxValue （DisplayMetrics類中屬性scaledDensity）
     * @return
     */
    public static int px2sp(Context context, float pxValue) {
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (pxValue / fontScale + 0.5f);
    }

    /**
     * 將sp值轉換爲px值，保證文字大小不變
     *
     * @param spValue （DisplayMetrics類中屬性scaledDensity）
     * @return
     */
    public static int sp2px(Context context, float spValue) {
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (spValue * fontScale + 0.5f);
    }
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    /**
     * 有木有SD卡
     * @return
     */
    public static boolean withSDCard() {
        return android.os.Environment.getExternalStorageState().equals(
                android.os.Environment.MEDIA_MOUNTED);
    }

    /**
     * 回到launcher界面,相當於點擊home鍵
     * @param context
     */
    public static void RedirectToHomeFace(Context context) {
        Intent mHomeIntent = new Intent(Intent.ACTION_MAIN);
        mHomeIntent.addCategory(Intent.CATEGORY_HOME);
        mHomeIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK
                | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
        context.startActivity(mHomeIntent);
    }
}

/** * 判斷是否是 Tablet(來自知乎用戶麪條的回答) * * @param activity Activity * @return true, if is tablet device */public static boolean isTablet(Activity activity) {    DisplayMetrics dm = new DisplayMetrics();    activity.getWindowManager().getDefaultDisplay().getMetrics(dm);    double diagonalPixels = Math.sqrt(Math.pow(dm.widthPixels, 2) + Math.pow(dm.heightPixels, 2));    double screenSize = diagonalPixels / (160 * dm.density);    return screenSize >= 6.0D;}