【Android】Android工具函数整理

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 {

/**
* 发送短信
*
* @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);
}

/**
* 点亮屏幕然后解锁,需要权限: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();
}

/**
* 判断当前程序是否在前台,需要权限: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;
}

/**
* 有木有链接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;
}

/**
* 安装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);
}

/**
* 根据手机的分辨率从 dp 的单位 转成为 px(像素)
*/
public static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}

/**
* 根据手机的分辨率从 px 转成为 dp
*/
public static int px2dip(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}

/**
* 根据手机的分辨率从 dp 转成为 px
*/
public static int dp2px(Context context, int dp) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp,
context.getResources().getDisplayMetrics());
}

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

/**
* 获取手机屏幕宽度
*
* @param context
* @return
*/
public static int getScreenWidth(Activity context) {
DisplayMetrics dm = new DisplayMetrics();
context.getWindowManager().getDefaultDisplay().getMetrics(dm);
return dm.widthPixels;
}

/**
* 获取状态栏高度
*
* @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;
}

/**
* 拨打电话,,需要权限: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)));
}

/**
* 跳转到拨号界面
*
* @param context
* @param phoneNumber
*/
public static void callDial(Context context, String phoneNumber) {
context.startActivity(new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + phoneNumber)));
}

/**
* 隐藏键盘
*
* @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);
}

/**
* 显示键盘
*
* @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);
}

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

/**
* 获取app的版本号
* @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;
}

/**
* 当前手机是否处于睡眠状态
*
* @param context
* @return
*/
public static boolean isSleeping(Context context) {
KeyguardManager kgMgr = (KeyguardManager) context
.getSystemService(Context.KEYGUARD_SERVICE);
boolean isSleeping = kgMgr.inKeyguardRestrictedInputMode();
return isSleeping;
}

/**
* 能否联网
*
* @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;
}

/**
* 将px值转换为sp值，保证文字大小不变
*
* @param pxValue （DisplayMetrics类中属性scaledDensity）
* @return
*/
public static int px2sp(Context context, float pxValue) {
final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int) (pxValue / fontScale + 0.5f);
}

/**
* 将sp值转换为px值，保证文字大小不变
*
* @param spValue （DisplayMetrics类中属性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,相当于点击home键
* @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);
}
}

/** * 判断是否是 Tablet(来自知乎用户面条的回答) * * @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;}