[移动开发]Android常用工具类

ToastUtils

public class ToastUtils {

    private static Toast mToast;

    public static void showToast(String tips){
        if (mToast == null) {
            mToast = Toast.makeText(BaseApplication.getContext(), tips, Toast.LENGTH_SHORT);
        }else {
            mToast.show();
        }

    }

//    public static void showToast(Context context,String tips){
//        if (mToast == null) {
//            mToast = Toast.makeText(context, tips, Toast.LENGTH_SHORT);
//        }else {
//            mToast.show();
//        }
//
//    }
}

SizeUtils

//根据手机分辨率从dp转成px
public class SizeUtils {
    public static int dip2px(Context context, float dpValue) {
        float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }

    //根据手机分辨率从px转成为dip
    public static int px2dip(Context context, float pxValue) {
        //获取当前手机的像素密度
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f); //四舍五入取整
    }

}

LogUtils

  public class LogUtils {

        private static int currentLev = 5;
        private static final int DEBUG_LEV = 4;
        private static final int INFO_LEV = 3;
        private static final int WARNING_LEV = 2;
        private static final int ERROR_LEV = 1;


        public static void d(Object clazz,String log) {
            if(currentLev >= DEBUG_LEV) {
                Log.d(clazz.getClass().getSimpleName(),log);
            }
        }

        public static void i(Object clazz,String log) {
            if(currentLev >= INFO_LEV) {
                Log.i(clazz.getClass().getSimpleName(),log);
            }
        }

        public static void w(Object clazz,String log) {
            if(currentLev >= WARNING_LEV) {
                Log.w(clazz.getClass().getSimpleName(),log);
            }
        }

        public static void e(Object clazz,String log) {
            if(currentLev >= ERROR_LEV) {
                Log.e(clazz.getClass().getSimpleName(),log);
            }
        }

    }

RetrofitManager

public class RetrofitManager {

    public static final RetrofitManager mRetrofitManager = new RetrofitManager();
    private final Retrofit mRetrofit;

    public static RetrofitManager getInstance() {
        return mRetrofitManager;
    }

    public RetrofitManager() {
        //创建Retrofit
        this.mRetrofit = new Retrofit.Builder()
                .baseUrl(Constant.BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
    }

    public Retrofit getRetrofit(){
        return mRetrofit;
    }
}