Activity、Fragment、Dialog基类简单整理
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概述
这里简单记录下Activity、Fragment、Dialog基类中的常规写法,后续根据项目需求进行相应的扩展。
BaseActivity.java
package com.why.project.myapptemplet.activity; import android.content.pm.ActivityInfo; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.DisplayMetrics; import android.util.Log; import android.view.Window; /** * Created by HaiyuKing * Used */ public class BaseActivity extends AppCompatActivity { private static final String TAG = BaseActivity.class.getSimpleName(); public static int screenWidth;//屏幕宽度 public static int screenHeight;//屏幕高度 public static int screenDendity;//屏幕密度比例 public static int screenDendityDpi;//屏幕密度 @Override protected void onCreate(Bundle savedInstanceState) { // 去掉标题栏 this.requestWindowFeature(Window.FEATURE_NO_TITLE); //保持屏幕为横屏或者竖屏,禁止旋转 setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);//竖屏 //setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);//横屏 //将Acitivity 中的Window 的背景图设置为空,解决Android Activity切换时出现白屏问题 getWindow().setBackgroundDrawable(null); //打印当前活动的activity Log.d(TAG, getClass().getSimpleName());// 知晓当前是在哪一个活动 //3、获取屏幕宽和高 DisplayMetrics metric = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(metric); screenWidth = metric.widthPixels;// 屏幕宽度(像素) screenHeight = metric.heightPixels;//屏幕高度(像素) screenDendity = (int) metric.density;//屏幕密度比例3 screenDendityDpi = metric.densityDpi;//屏幕密度480 super.onCreate(savedInstanceState); } }
BaseFragment.java
package com.why.project.myapptemplet.fragment; import android.os.Bundle; import android.support.v4.app.Fragment; /** * Used 基础碎片类 */ public class BaseFragment extends Fragment { //传递过来的参数Bundle,供子类使用 protected Bundle args; /** * 创建fragment的静态方法,方便传递参数 * @param args 传递的参数 * @return */ public static <T extends Fragment>T getInstance(Class clazz, Bundle args) { T mFragment=null; try { mFragment= (T) clazz.newInstance(); } catch (java.lang.InstantiationException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } mFragment.setArguments(args); return mFragment; } /** * 初始创建Fragment对象时调用 * @param savedInstanceState */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); args = getArguments(); } }
BaseDialogFragment.java
package com.why.project.myapptemplet.dialog; import android.support.v4.app.DialogFragment; /** * Created by HaiyuKing * Used */ public class BaseDialogFragment extends DialogFragment { }
参考资料
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