新手必备的常用代码片段整理（一）
原文地址：http://blog.csdn.net/zhaokaiqiang1992
以下内容来自多个开源项目的整理和自己的项目积累
-
- 拨打电话
- 跳转至拨号界面
- 发送短信
- 唤醒屏幕并解锁
- 判断当前App处于前台还是后台状态
- 判断当前手机是否处于锁屏睡眠状态
- 判断当前是否有网络连接
- 判断当前是否是WIFI连接状态
- 安装APK
- 判断当前设备是否为手机
- 获取当前设备宽高单位px
- 获取当前设备的IMEI需要与上面的isPhone一起使用
- 获取当前设备的MAC地址
- 获取当前程序的版本号
拨打电话
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public
static
void
call(Context context, String phoneNumber) {
context.startActivity(
new
Intent(Intent.ACTION_CALL, Uri.parse(
'tel:'
+ phoneNumber)));
}
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跳转至拨号界面
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public
static
void
callDial(Context context, String phoneNumber) {
context.startActivity(
new
Intent(Intent.ACTION_DIAL, Uri.parse(
'tel:'
+ phoneNumber)));
}
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发送短信
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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);
}
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唤醒屏幕并解锁
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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();
}
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需要添加权限
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<
uses-permission
android:name
=
'android.permission.WAKE_LOCK'
/>
<
uses-permission
android:name
=
'android.permission.DISABLE_KEYGUARD'
/>
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判断当前App处于前台还是后台状态
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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
;
}
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需要添加权限
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<
uses-permission
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判断当前手机是否处于锁屏(睡眠)状态
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public
static
boolean
isSleeping(Context context) {
KeyguardManager kgMgr = (KeyguardManager) context
.getSystemService(Context.KEYGUARD_SERVICE);
boolean
isSleeping = kgMgr.inKeyguardRestrictedInputMode();
return
isSleeping;
}
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判断当前是否有网络连接
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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
;
}
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判断当前是否是WIFI连接状态
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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
;
}
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安装APK
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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);
}
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判断当前设备是否为手机
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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
;
}
}
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获取当前设备宽高，单位px
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@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();
}
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获取当前设备的IMEI，需要与上面的isPhone()一起使用
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@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;
}
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获取当前设备的MAC地址
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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;
}
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获取当前程序的版本号
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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;
}
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