Android开发工具类样式一些配置
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android Studio 开发工具类、样式、其余的配置
一、工具类
1.Log输出
增强型Log输出工具类
package xxx;
import android.text.TextUtils;
import android.util.Log;
/**
* 增强型Log工具，提取自XUtils工具集，强化了输出功能，可以输出长字符串
* 自定义TAG输出格式：customTagPrefix:className.methodName(L:lineNumber)
*/
public class LogEx
public static boolean isDebug = true;
public static String customTagPrefix = "X_LOG";
private static final int stringBuffer = 2000;
private LogEx()
private static String generateTag()
StackTraceElement caller = new Throwable().getStackTrace()[2];
String tag = "%s.%s(L:%d)";
String callerClazzName = caller.getClassName();
callerClazzName = callerClazzName.substring(callerClazzName.lastIndexOf(".") + 1);
tag = String.format(tag, callerClazzName, caller.getMethodName(), caller.getLineNumber());
tag = TextUtils.isEmpty(customTagPrefix) ? tag : customTagPrefix + ":" + tag;
return tag;
public static void d(String content)
if (!isDebug) return;
String tag = generateTag();
printLog("d", tag, content, null);
public static void d(String content, Throwable tr)
if (!isDebug) return;
String tag = generateTag();
printLog("d", tag, content, tr);
public static void e(String content)
if (!isDebug) return;
String tag = generateTag();
printLog("e", tag, content, null);
public static void e(String content, Throwable tr)
if (!isDebug) return;
String tag = generateTag();
printLog("e", tag, content, tr);
public static void i(String content)
if (!isDebug) return;
String tag = generateTag();
printLog("i", tag, content, null);
public static void i(String content, Throwable tr)
if (!isDebug) return;
String tag = generateTag();
printLog("i", tag, content, tr);
public static void v(String content)
if (!isDebug) return;
String tag = generateTag();
printLog("v", tag, content, null);
public static void v(String content, Throwable tr)
if (!isDebug) return;
String tag = generateTag();
printLog("v", tag, content, tr);
public static void w(String content)
if (!isDebug) return;
String tag = generateTag();
printLog("w", tag, content, null);
public static void w(String content, Throwable tr)
if (!isDebug) return;
String tag = generateTag();
printLog("w", tag, content, tr);
public static void w(Throwable tr)
if (!isDebug) return;
String tag = generateTag();
printLog("w", tag, null, tr);
public static void wtf(String content)
if (!isDebug) return;
String tag = generateTag();
printLog("wtf", tag, content, null);
public static void wtf(String content, Throwable tr)
if (!isDebug) return;
String tag = generateTag();
printLog("wtf", tag, content, tr);
public static void wtf(Throwable tr)
if (!isDebug) return;
String tag = generateTag();
printLog("wtf", tag, null, tr);
private static void printLog(String type, String tag, String content, Throwable tr)
long length = content.length();
if (length < stringBuffer || length == stringBuffer)
switchLog(type, tag, content, tr);
else
while (content.length() > stringBuffer)
String logContent = content.substring(0, stringBuffer);
content = content.replace(logContent, "");
switchLog(type, tag, logContent, tr);
switchLog(type, tag, content, tr);
private static void switchLog(String type, String tag, String content, Throwable tr)
switch (type.trim().toLowerCase())
case "i":
Log.i(tag, content, tr);
break;
case "v":
Log.v(tag, content, tr);
break;
case "d":
Log.d(tag, content, tr);
break;
case "e":
Log.e(tag, content, tr);
break;
case "w":
Log.w(tag, content, tr);
break;
case "wtf":
Log.wtf(tag, content, tr);
default:
Log.i(tag, content, tr);
使用方式类似于Log类，加入了自定义的 X_LOG 前缀
LogEx.i(">>>>>>> onStart MainActivity screen size:" + 2400 + " " + 936);
//打印：I/X_LOG:MainActivity.onCreate(L:178): >>>>>>> onStart MainActivity screen size:2400 936
2.轻量存储SharedPreferences
其中使用到了MyApp.content，其实就是指向一个Context，也可以在构造时作为参数传递给工具类
MyApp.class 内容举例
public class MyApp extends Application
public static Context context;
@Override
public void onCreate()
super.onCreate();
context = getApplicationContext();
SpUtils 工具类如下
package xxx;
import android.content.Context;
import android.content.SharedPreferences;
import xxx.MyApp;
/** 轻量存储工具类SharedPreferences */
public class SpUtils
private SharedPreferences sp;
private SharedPreferences.Editor editor;
/** 常量的形式保存KEY在此类里面 */
public static final String USER_NAME = "username";
private SpUtils(String name)
sp = MyApp.context.getSharedPreferences(name, Context.MODE_PRIVATE);
editor = sp.edit();
/** 单例模式 */
private static SpUtils instance;
public static SpUtils getInstance(String name)
if (instance == null)
synchronized (SpUtils.class)
if (instance == null)
instance = new SpUtils(name);
return instance;
/** String */
public void putString(String spName, String value)
editor.putString(spName, value);
editor.commit();
public String getString(String spName, String defaultvalue)
return sp.getString(spName, defaultvalue);
public String getString(String spName)
return sp.getString(spName, "");
/** Int */
public void putInt(String spName, int value)
editor.putInt(spName, value);
editor.commit();
public int getInt(String spName, int defaultvalue)
return sp.getInt(spName, defaultvalue);
/** Float */
public void putFloat(String key, float value)
editor.putFloat(key, value);
editor.commit();
public float getFloat(String key, float defValue)
return sp.getFloat(key, defValue);
/** Long */
public void putLong(String key, long value)
editor.putLong(key, value);
editor.commit();
public long getLong(String key, long defValue)
return sp.getLong(key, defValue);
/** Boolean */
public void putBoolean(String key, boolean value)
editor.putBoolean(key, value);
editor.commit();
public boolean getBoolean(String key, boolean defValue)
return sp.getBoolean(key, defValue);
/** 查看SP文件中是否存在此 key */
public boolean hasExists(String fileName, String key)
return sp.contains(key);
/** 清空SP里所有数据 */
public void clear()
editor.clear();
editor.commit();
/** 删除SP里指定key对应的数据项 */
public void remove(String key)
editor.remove(key);
editor.commit();
简单使用一下，例如：清空账号与密码缓存时的操作
// 重新登录时，缓存密码清空
SpUtils.getInstance("userinfo").putString("password", "");
SpUtils.getInstance("userinfo").putString("account", "");
二、主题与样式
1.主题
对于主题的介绍，我们来看以下博主们的精美文章吧，介绍的都很不错，我先划下水
https://blog.csdn.net/geduo_83/article/details/86561559
https://blog.csdn.net/l707941510/article/details/93772581
https://blog.csdn.net/xchaha/article/details/79047140
2.常用样式
1.按钮圆角背景
在 drawable 目录下新建 btn_radius_red.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@color/colorPrimaryDark"/>
<corners android:topLeftRadius="10dip"
android:topRightRadius="10dip"
android:bottomRightRadius="10dip"
android:bottomLeftRadius="10dip" />
</shape>
使用：
android:background="@drawable/btn_radius_red"
<Button
style="@style/text_12_white"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="@dimen/length_10"
android:layout_marginEnd="@dimen/length_10"
android:layout_weight="1"
android:background="@drawable/btn_radius_red"
android:minHeight="@dimen/length_30"
android:text="保 存" />
效果：
2.按钮圆角边框
在 drawable 目录下新建 btn_border_red.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<corners android:radius="5dp" />
<stroke
android:width="1dp"
android:color="@color/colorPrimary" />
<solid android:color="@color/transparent" />
<padding
android:bottom="@dimen/length_2"
android:left="@dimen/length_2"
android:right="@dimen/length_2"
android:top="@dimen/length_2" />
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