Android常用工具類的封裝
-
Android常用工具類的封裝
- Log封裝類
- sharedPreferences封裝類:
- 自定義字體封裝類:
- Md5工具類
- 線程睡眠
- 檢查網(wǎng)絡(luò)是否連通
- 異常類捕捉
- 彈出框提醒
- 圖片API類
- 提醒吐司封裝類
Log封裝類
為什么要封裝Log,這是因?yàn)槲覀兠看屋斎隠og的時(shí)候,每次都要輸入TAG,例如這樣:
Log.d("tonjie","要輸出的內(nèi)容");
1
即便我們可以在一個(gè)類中聲明常量TAG,private static final String TAG = “tonjies”;也仍然需要輸入常量,而且很多時(shí)候我都是調(diào)試完程序,在程序沒有問題的情況下就把Log刪除的,所以練習(xí)時(shí)的簡便就是我需要的,那么廢話不多說,直接看代碼吧!
public class L {
//TAG
public static String TAG = "tonjies";
//5個(gè)等級 DIWE
public static void d(String text) {
Log.d(TAG, text + "");
}
public static void i(String text) {
Log.i(TAG, text + "");
}
public static void w(String text) {
Log.w(TAG, text + "");
}
public static void e(String text) {
Log.e(TAG, text + "");
}
}
怎么樣,相當(dāng)簡單的代碼吧!我們只是把每次都要輸入的TAG,提取出來,并把該值設(shè)置成默認(rèn)的值罷了,讓我們來看看怎么使用
//┏┓ ┏┓ //┏┛┻━━━┛┻┓ //┃ ┃ //┃ ━ ┃ //┃ ┳┛ ┗┳ ┃ //┃ ┃ //┃ ┻ ┃ //┃ ┃ //┗━┓ ┏━┛ //┃ ┃ 神獸保佑 //┃ ┃ 代碼無BUG! //┃ ┗━━━┓ //┃ ┣┓ //┃ ┏┛ //┗┓┓┏━┳┓┏┛ // ┃┫┫ ┃┫┫ // public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); L.d("log打印成功"); } }我們輸入L.d(“你好,世界”),運(yùn)行程序,輸入tonjies,觀察Logo,果然成功了,怎么樣,只輸入兩個(gè)字母的Log是不是稍微方便一點(diǎn)了
這樣封裝可能會出現(xiàn)一個(gè)問題,就是在不經(jīng)意用了太多的L工具類,導(dǎo)致輸出的東西太亂,這時(shí)候我們可以選中L類,右鍵Find Usages,或者使用快捷鍵Alt+F7,在下邊的find窗口查看我們都在哪里使用過,把不需要的注釋或者刪除掉
sharedPreferences封裝類:
關(guān)于SharedPreferences的用法就不贅述了,詳情請查看第一行代碼第6.4節(jié),強(qiáng)烈推薦使用科學(xué)的方法查看數(shù)據(jù)庫文件,如facebook的stetho,這里封裝的目的和封裝Log一樣,同樣是為了簡化操作,讓我們先來看看原本的用法
- 存數(shù)據(jù):
SharedPreferences.Editor editor=getSharedPreferences("data",MODE_PRIVATE).edit();
editor.putString("name","tonjies");
editor.putInt("age",20);
editor.apply();
- 取數(shù)據(jù):
SharedPreferences preferences = getSharedPreferences("data", MODE_PRIVATE);
String name = preferences.getString("name", "");
int age = preferences.getInt("age", 18);
L.d("name:" + name);
L.d("age" + age);
使用stetho工具查看:
封裝類:
/**
* Created by 舍長 on 2018/2/10.
* SharedPreferences 封裝類
*/
public class ShareUtils {
public static final String NAME = "config";
/**
* 存儲String類型的值
* @param mContext this
* @param key key值
* @param value 要存儲的String值
*/
public static void putString(Context mContext, String key, String value) {
SharedPreferences sharedPreferences = mContext.getSharedPreferences(NAME, Context.MODE_PRIVATE);
sharedPreferences.edit().putString(key, value).commit();
}
/**
* 獲取String類型的值
* @param mContext this
* @param key key
* @param defValue 默認(rèn)值
* @return
*/
public static String getString(Context mContext, String key, String defValue) {
SharedPreferences sharedPreferences = mContext.getSharedPreferences(NAME, Context.MODE_PRIVATE);
return sharedPreferences.getString(key, defValue);
}
/**
* 存儲Int類型的值
* @param mContext this
* @param key key
* @param value 要存儲的Int值
*/
public static void putInt(Context mContext, String key, int value) {
SharedPreferences sharedPreferences = mContext.getSharedPreferences(NAME, Context.MODE_PRIVATE);
sharedPreferences.edit().putInt(key, value).commit();
}
/**
* 獲取Int類型的值
* @param mContext this
* @param key key
* @param defValue 默認(rèn)值
* @return
*/
public static int getInt(Context mContext, String key, int defValue) {
SharedPreferences sharedPreferences = mContext.getSharedPreferences(NAME, Context.MODE_PRIVATE);
return sharedPreferences.getInt(key, defValue);
}
/**
* 存儲Boolean類型的值
* @param mContext this
* @param key key
* @param value 要存儲Boolean值
*/
public static void putBoolean(Context mContext, String key, boolean value) {
SharedPreferences sharedPreferences = mContext.getSharedPreferences(NAME, Context.MODE_PRIVATE);
sharedPreferences.edit().putBoolean(key, value).commit();
}
/**
* 獲取Boolean類型的值
* @param mContext this
* @param key key
* @param defValue 默認(rèn)值
* @return
*/
public static boolean getBoolean(Context mContext, String key, Boolean defValue) {
SharedPreferences sharedPreferences = mContext.getSharedPreferences(NAME, Context.MODE_PRIVATE);
return sharedPreferences.getBoolean(key, defValue);
}
//刪除 單個(gè) key
public static void deleShare(Context context, String key) {
SharedPreferences sharedPreferences = context.getSharedPreferences(NAME, Context.MODE_PRIVATE);
sharedPreferences.edit().remove(key).commit();
}
//刪除全部 key
public static void deleAll(Context context) {
SharedPreferences sharedPreferences = context.getSharedPreferences(NAME, Context.MODE_PRIVATE);
sharedPreferences.edit().clear().commit();
}
}
我們把可復(fù)用的SharedPreferences類名和方法提取出來,并把不同的context對象,想要存儲的值 ,想要去除去除的key字段值 , 默認(rèn)值等傳入,看看具體的用法吧!
- 存數(shù)據(jù):
//取出String類型
final String string = ShareUtils.getString(ShareActivity.this, "name", "沒有值可以取出來");
L.d(string);
- 取數(shù)據(jù):
//取出int類型
final int age2= ShareUtils.getInt(ShareActivity.this, "age", 18);
L.d(age2+"");
自定義字體封裝類:
老規(guī)矩了,先看看原本應(yīng)該如何實(shí)現(xiàn)
在src-main-asset(需要自己創(chuàng)建)-fonts(自己創(chuàng)建)-添加字體-MengYuanti.ttf
private void type() {
Typeface typeface=Typeface.createFromAsset(getAssets(),"fonts/MengYuanti.ttf");
txtB.setTypeface(typeface);
}
封裝類:
/**
* Created by 舍長 on 2018/4/27.
*/
public class FontSetting {
public FontSetting() {
}
public static void setFont(Context context, TextView textView, String fontsPath) {
try {
Typeface fromAsset = Typeface.createFromAsset(context.getAssets(), fontsPath);
textView.setTypeface(fromAsset);
} catch (Exception e) {
L.d("找不到文件資源!");
Toast.makeText(context, "服務(wù)器出錯(cuò)啦!", Toast.LENGTH_SHORT).show();
}
}
}
我們添加了setFont方法,并try…catch了一下,為什么要進(jìn)行異常處理呢,因?yàn)槿绻覀兊膄ontPath路徑fontsPath錯(cuò)誤了,比如”fonts/MengYuanti.ttf”變?yōu)榱恕眆onts/engYuanti.ttf”,程序會跑出java.lang.RuntimeException:異常,程序會崩潰、所以我們進(jìn)行異常捕獲,并且告訴用戶,是服務(wù)器出現(xiàn)了異常,這樣用戶的投訴就會讓服務(wù)器人員去背,完美!
具體使用:
/**
* Created by 舍長 on 2018/4/5.
* 描述: Android字體設(shè)置
*/
public class FontActivity extends WinBaseActivity {
@BindView(R.id.txt_01)
TextView txt01;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.switch_item_layout);
ButterKnife.bind(this);
FontSetting.setFont(FontActivity.this,txt01,"fonts/chuxintech.woff");
}
}
四、MD5封裝工具類
public class MD5Util {
public final static String MD5(String s) {
char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'a', 'b', 'c', 'd', 'e', 'f' };
try {
byte[] btInput = s.getBytes();
// 獲得MD5摘要算法的 MessageDigest 對象
MessageDigest mdInst = MessageDigest.getInstance("MD5");
// 使用指定的字節(jié)更新摘要
mdInst.update(btInput);
// 獲得密文
byte[] md = mdInst.digest();
// 把密文轉(zhuǎn)換成十六進(jìn)制的字符串形式
int j = md.length;
char str[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
return new String(str);
} catch (Exception e) {
return null;
}
}
public static void main(String[] args) {
System.out.print(MD5Util.MD5("password"));
}
}
五、線程睡眠工具類
public class CSleep {
public static final long DEFAULT_SLEEP_TIME = 500;
private boolean isRuning = false;
public boolean isRuning() {
return isRuning;
}
public void runWithTime(final long defaultSleepTime) {
isRuning = true;
new Thread() {
@Override
public void run() {
try {
sleep(defaultSleepTime, 0);
} catch (InterruptedException e) {
e.printStackTrace();
}
isRuning = false;
super.run();
}
}.start();
}
}
六、檢查網(wǎng)絡(luò)是否連通
/**
* 檢查網(wǎng)絡(luò)是否連通
*
* @return boolean
* @since V1.0
*/
public boolean isNetworkAvailable(Context context) {
// 創(chuàng)建并初始化連接對象
ConnectivityManager connMan = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
// 判斷初始化是否成功并作出相應(yīng)處理
if (connMan != null) {
// 調(diào)用getActiveNetworkInfo方法創(chuàng)建對象,如果不為空則表明網(wǎng)絡(luò)連通,否則沒連通
NetworkInfo info = connMan.getActiveNetworkInfo();
if (info != null) {
return info.isAvailable();
}
}
return false;
}
七、異常類捕捉
/**
* UncaughtException處理類,當(dāng)程序發(fā)生Uncaught異常的時(shí)候,由該類來接管程序,并記錄發(fā)送錯(cuò)誤報(bào)告. 需要在Application中注冊,為了要在程序啟動器就監(jiān)控整個(gè)程序。
*/
public class CrashHandler implements UncaughtExceptionHandler {
/** TAG */
public static final String TAG = "CrashHandler";
/** 系統(tǒng)默認(rèn)的UncaughtException處理類 */
private Thread.UncaughtExceptionHandler mDefaultHandler;
/** CrashHandler實(shí)例 */
private static CrashHandler mCrashHandler;
/** 程序的Context對象 */
private Context mContext;
/** 用來存儲設(shè)備信息和異常信息 */
private Map<String, String> infos = new HashMap<String, String>();
/** 用于格式化日期,作為日志文件名的一部分 */
private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
/**
* 私有構(gòu)造函數(shù)
*/
private CrashHandler() {
}
/**
* 獲取CrashHandler實(shí)例 ,單例模式
*
* @return
* @since V1.0
*/
public static CrashHandler getInstance() {
if (mCrashHandler == null)
mCrashHandler = new CrashHandler();
return mCrashHandler;
}
/**
* 初始化
*
* @param context
* @since V1.0
*/
public void init(Context context) {
mContext = context;
// 獲取系統(tǒng)默認(rèn)的UncaughtException處理器
mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
// 設(shè)置該CrashHandler為程序的默認(rèn)處理器
Thread.setDefaultUncaughtExceptionHandler(this);
}
/**
* 當(dāng)UncaughtException發(fā)生時(shí)會轉(zhuǎn)入該函數(shù)來處理
*/
@Override
public void uncaughtException(Thread thread, Throwable ex) {
if (!handleException(ex) && mDefaultHandler != null) {
// 如果用戶沒有處理則讓系統(tǒng)默認(rèn)的異常處理器來處理
mDefaultHandler.uncaughtException(thread, ex);
} else {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
CLog.e(TAG, "uncaughtException() InterruptedException:" + e);
}
// 退出程序
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(1);
}
}
/**
* 自定義錯(cuò)誤處理,收集錯(cuò)誤信息 發(fā)送錯(cuò)誤報(bào)告等操作均在此完成.
*
* @param ex
* @return true:如果處理了該異常信息;否則返回false.
* @since V1.0
*/
private boolean handleException(Throwable ex) {
if (ex == null) {
return false;
}
// 收集設(shè)備參數(shù)信息
collectDeviceInfo(mContext);
// 使用Toast來顯示異常信息
new Thread() {
@Override
public void run() {
Looper.prepare();
Toast.makeText(mContext, "很抱歉,程序出現(xiàn)異常,即將退出.", Toast.LENGTH_SHORT).show();
Looper.loop();
}
}.start();
// 保存日志文件
saveCatchInfo2File(ex);
return true;
}
/**
* 收集設(shè)備參數(shù)信息
*
* @param ctx
* @since V1.0
*/
public void collectDeviceInfo(Context ctx) {
try {
PackageManager pm = ctx.getPackageManager();
PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);
if (pi != null) {
String versionName = pi.versionName == null ? "null" : pi.versionName;
String versionCode = pi.versionCode + "";
infos.put("versionName", versionName);
infos.put("versionCode", versionCode);
}
} catch (NameNotFoundException e) {
CLog.e(TAG, "collectDeviceInfo() an error occured when collect package info NameNotFoundException:", e);
}
Field[] fields = Build.class.getDeclaredFields();
for (Field field : fields) {
try {
field.setAccessible(true);
infos.put(field.getName(), field.get(null).toString());
CLog.d(TAG, field.getName() + " : " + field.get(null));
} catch (Exception e) {
CLog.e(TAG, "collectDeviceInfo() an error occured when collect crash info Exception:", e);
}
}
}
/**
* 保存錯(cuò)誤信息到文件中
*
* @param ex
* @return 返回文件名稱,便于將文件傳送到服務(wù)器
*/
private String saveCatchInfo2File(Throwable ex) {
StringBuffer sb = new StringBuffer();
for (Map.Entry<String, String> entry : infos.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
sb.append(key + "=" + value + "\n");
}
Writer writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
ex.printStackTrace(printWriter);
Throwable cause = ex.getCause();
while (cause != null) {
cause.printStackTrace(printWriter);
cause = cause.getCause();
}
printWriter.close();
String result = writer.toString();
sb.append(result);
try {
long timestamp = System.currentTimeMillis();
String time = formatter.format(new Date());
String fileName = "crash-" + time + "-" + timestamp + ".log";
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
String path = FilePathUtil.getiVMSDirPath() + "/crash/";
File dir = new File(path);
if (!dir.exists()) {
dir.mkdirs();
}
FileOutputStream fos = new FileOutputStream(path + fileName);
fos.write(sb.toString().getBytes());
// 發(fā)送給開發(fā)人員
sendCrashLog2PM(path + fileName);
fos.close();
}
return fileName;
} catch (Exception e) {
CLog.e(TAG, "saveCatchInfo2File() an error occured while writing file... Exception:", e);
}
return null;
}
/**
* 將捕獲的導(dǎo)致崩潰的錯(cuò)誤信息發(fā)送給開發(fā)人員 目前只將log日志保存在sdcard 和輸出到LogCat中,并未發(fā)送給后臺。
*
* @param fileName
* @since V1.0
*/
private void sendCrashLog2PM(String fileName) {
if (!new File(fileName).exists()) {
CLog.e(TAG, "sendCrashLog2PM() 日志文件不存在");
return;
}
FileInputStream fis = null;
BufferedReader reader = null;
String s = null;
try {
fis = new FileInputStream(fileName);
reader = new BufferedReader(new InputStreamReader(fis, "GBK"));
while (true) {
s = reader.readLine();
if (s == null)
break;
// 由于目前尚未確定以何種方式發(fā)送,所以先打出log日志。
CLog.e(TAG, s);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally { // 關(guān)閉流
try {
reader.close();
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
八、彈出框提醒
public static Dialog showDialog(Context ctx, int layViewID, int ThemeType) {
Dialog res = new Dialog(ctx, ThemeType);
res.setContentView(layViewID);
return res;
}
九、圖片API類
public class ImageAPI {
public static Bitmap getImageByFilePath(String filePath, int scale) {
Bitmap res = null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, options);
options.inJustDecodeBounds = false;
options.inSampleSize = scale;
options.inPreferredConfig = Bitmap.Config.ARGB_4444;
return res;
}
public static Bitmap getImageByFilePath(String filePath, int Towidth, int ToHeight) {
Bitmap res = null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
if (!new File(filePath).exists())
return res;
BitmapFactory.decodeFile(filePath, options);
int origionalWidth = options.outHeight;
int origionalHeight = options.outWidth;
options.inJustDecodeBounds = false;
int scale = Math.max(origionalWidth / Towidth, origionalHeight / ToHeight);
options.inSampleSize = scale;
options.inPreferredConfig = Bitmap.Config.ARGB_4444;
try {
res = BitmapFactory.decodeFile(filePath, options);
} catch (Exception e) {
e.printStackTrace();
return null;
} catch (OutOfMemoryError e) {
e.printStackTrace();
return null;
}
return res;
}
}
十、提醒吐司封裝類
public static void showToast(Context ctx, int id, String str) {
if (str == null) {
return;
}
Toast toast = Toast.makeText(ctx, ctx.getString(id) + str, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
public static void showToast(Context ctx, String errInfo) {
if (errInfo == null) {
return;
}
Toast toast = Toast.makeText(ctx, errInfo, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
@希望能幫到你!