Android(安卓)开发之基类（一）

不说太多，直接上代码，不懂再说，只是一些零碎代码做个记录，各位看官看得懂，我深表荣幸，看不懂我也没法。

import com.huianrong.app.widget.toast.HuiToast;/** * Created by LanYan on 2015/11/17. */public interface OnBaseListener {    /** * Code set theme related properties, such as: remove the title bar, full screen mode. Simple: * //设置无标题 * requestWindowFeature(Window.FEATURE_NO_TITLE); * //设置全屏 * getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, * WindowManager.LayoutParams.FLAG_FULLSCREEN); * 代码设置主题相关属性，比如：去掉标题栏，全屏模式等。 */    void applyTheme();    /** * When the activity call the setContentView (int layout) method, this method is called to return to the layout * 当activity 调用setContentView（int layout） 方法时，调用此方法返回Layout * @return R.layout.xx */    int setContentViewId();    /** * initialization operation */    void initiazed();    /** * 短时间的提示 * Tips for a short period of time * @param content */    void shortToast(String content);    /** * 长时间的提示 * Tips for a long period of time * @param content */    void longToast(String content);}

每个Activity需要涉及到的调用方法，下面是FragmentActivity基类（基于Xutils的注解）：

import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.os.PersistableBundle;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentActivity;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentTabHost;import android.support.v4.app.FragmentTransaction;import android.view.View;import android.widget.Toast;import com.huianrong.app.HuiApplication;import com.huianrong.app.Interfaces.OnBaseListener;import com.huianrong.app.helper.FragmentHelper;import com.huianrong.app.widget.toast.HuiToast;import com.lidroid.xutils.ViewUtils;import java.util.ArrayList;/** * Created by LanYan on 2015/11/17. */public abstract class BaseFragmentActivity extends FragmentActivity implements OnBaseListener {    @Override    public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) {        super.onCreate(savedInstanceState, persistentState);        applyTheme();        setContentView(setContentViewId());        ViewUtils.inject(this);        HuiApplication.getInstance().addActivity(this);        initiazed();    }    @Override    public void applyTheme() {    }    @Override    public void initiazed() {    }     @Override     public void shortToast(String content) {       /*********ToastHelper略***********/    }    @Override    public void longToast(String content) {       /*********ToastHelper略***********/    }    /** * 显示指定的Fragment * According to the specified fragments * * @param framLayoutId * @param cls * @param <T> */    public <T extends Fragment> void replaceFragment(int framLayoutId, Class<T> cls) {        FragmentHelper.getInstance().replaceFragment(this, framLayoutId, cls);    }    /** * 显示指定的Fragment * According to the specified fragments * * @param framLayoutId * @param cls * @param tag * @param <T> */    public <T extends Fragment> void replaceFragment(int framLayoutId, Class<T> cls, String tag) {        FragmentHelper.getInstance().replaceFragment(this, framLayoutId, cls, null);    }    /** *添加Fragment集合并返回Fragment集合 * Add fragments set and return fragments * @param framLayoutId * @param clsList * @param <T> * @return */    public <T extends Fragment> ArrayList<Fragment> addFragmentList(int framLayoutId, Class<T>[] clsList) {        return FragmentHelper.getInstance().addFragmentList(this,framLayoutId, clsList);    }    /** *添加Fragment集合并返回Fragment集合 * Add fragments set and return fragments * @param framLayoutId * @param clsList * @param tag * @param <T> * @return */    public <T extends Fragment> ArrayList<Fragment> addFragmentList(int framLayoutId, Class<T>[] clsList, String tag) {        return FragmentHelper.getInstance().addFragmentList(this,framLayoutId, clsList, null);    }    /** * 显示指定的Fragment * According to the specified fragments */    public <T extends Fragment> void showFragment(int framLayoutId, int position, ArrayList<Fragment> mFragmentList) {        FragmentHelper.getInstance().showFragment(this, framLayoutId,position,mFragmentList);    }    /** * 创建Handler实例 * Create a Handler instance */    public Handler mHandler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            decodeHandleMessage(msg);        }    };    /** * 处理Handler接收到的消息 * Processing Handler receives the message * * @param msg */    protected void decodeHandleMessage(Message msg) {    }}

BaseActivity同理，这里就不做多解释，Dialog PopupWindow也需要在基类封装，这里不做累赘叙述，下面来看FragmentHelper（还可以扩展动画）类：

import android.app.Activity;import android.content.Context;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentActivity;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentTransaction;import android.view.View;import java.util.ArrayList;/** * Created by LanYan on 15/11/18. */public class FragmentHelper {    public static FragmentHelper instance;    public FragmentHelper(){    }    public static FragmentHelper getInstance(){        if(instance==null){            synchronized (FragmentHelper.class){                if(instance==null){                    instance=new FragmentHelper();                }            }        }        return instance;    }    /** * 显示指定的Fragment * According to the specified fragments * * @param framLayoutId * @param cls * @param <T> */    public <T extends Fragment> void replaceFragment(FragmentActivity mFragmentActivity,int framLayoutId, Class<T> cls) {        replaceFragment(mFragmentActivity,framLayoutId, cls, null);    }    /** * 显示指定的Fragment * According to the specified fragments * * @param framLayoutId * @param cls * @param tag * @param <T> */    public <T extends Fragment> void replaceFragment(FragmentActivity mFragmentActivity,int framLayoutId, Class<T> cls, String tag) {        FragmentManager mFragmentManager = mFragmentActivity.getSupportFragmentManager();        FragmentTransaction mTransaction = mFragmentManager.beginTransaction();        T t = null;        try {            t = cls.newInstance();        } catch (InstantiationException e) {            e.printStackTrace();        } catch (IllegalAccessException e) {            e.printStackTrace();        }        if (tag == null) {            mTransaction.replace(framLayoutId, t, cls.getName());        } else {            mTransaction.replace(framLayoutId, t, tag);        }        mTransaction.commit();    }    public <T extends Fragment> ArrayList<Fragment> addFragmentList(FragmentActivity mFragmentActivity,int framLayoutId, Class<T>[] clsList) {        return addFragmentList(mFragmentActivity,framLayoutId, clsList, null);    }    public <T extends Fragment> ArrayList<Fragment> addFragmentList(FragmentActivity mFragmentActivity,int framLayoutId, Class<T>[] clsList, String tag) {        ArrayList<Fragment> mFragmentList = new ArrayList<>();        FragmentManager mFragmentManager = mFragmentActivity.getSupportFragmentManager();        FragmentTransaction mTransaction = mFragmentManager.beginTransaction();        for (int i = 0; i < clsList.length; i++) {            T t = null;            try {                t = clsList[i].newInstance();                mTransaction.add(framLayoutId, t, tag == null ? clsList[i].getName() : tag);                mFragmentList.add(t);            } catch (InstantiationException e) {                e.printStackTrace();            } catch (IllegalAccessException e) {                e.printStackTrace();            }        }        mTransaction.commit();        return mFragmentList;    }    /** * 显示指定的Fragment * According to the specified fragments */    public <T extends Fragment> void showFragment(FragmentActivity mFragmentActivity,int framLayoutId, int position, ArrayList<Fragment> mFragmentList) {        FragmentManager mFragmentManager = mFragmentActivity.getSupportFragmentManager();        FragmentTransaction mTransaction = mFragmentManager.beginTransaction();        for (int i = 0; i < mFragmentList.size(); i++) {            if (i == position) {                mTransaction.show(mFragmentList.get(i));            } else {                mTransaction.hide(mFragmentList.get(i));            }        }        mTransaction.commit();    }}

下面是GsonHelper泛型解析数据：

import java.util.ArrayList;import com.google.gson.Gson;import com.google.gson.JsonArray;import com.google.gson.JsonElement;import com.google.gson.JsonParser;public class GsonHelper {    private static GsonHelper mInstance;    private Gson mGson;    public GsonHelper(){        mGson=new Gson();    }    public static GsonHelper getInstance(){        if(mInstance==null){            synchronized (GsonHelper.class) {                if(mInstance==null){                    mInstance=new GsonHelper();                 }            }        }        return mInstance;    }    public <T> ArrayList<T> fromJsonList(String json, Class<T> cls) {          ArrayList<T> mList = new ArrayList<T>();          JsonArray array = new JsonParser().parse(json).getAsJsonArray();          for(final JsonElement elem : array){              mList.add(mGson.fromJson(elem, cls));          }          return mList;      }    public <T> T fromJsonObject(String json, Class<T> cls){        return mGson.fromJson(json, cls);    }    public <T> String toJson(Object mObject){        return mGson.toJson(mObject);    }}

图片转String 工具类：

import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Matrix;import android.graphics.Bitmap.CompressFormat;import android.util.Base64;/** * Created by LanYan on 2015/11/17. */public class UploadImageHelper {    private static UploadImageHelper instance;    public UploadImageHelper() {    }    public static UploadImageHelper getInstance() {        if (instance == null) {            synchronized (UploadImageHelper.class) {                if (instance == null) {                    instance = new UploadImageHelper();                }            }        }        return instance;    }    /** * The picture file is transformed into a String * @param file * @return String */    public String getStringWithFile(File file) {        InputStream in = null;        byte[] data = null;        try {            in = new FileInputStream(file);            data = new byte[in.available()];            in.read(data);            in.close();        } catch (IOException e) {            e.printStackTrace();        }        return Base64.encodeToString(data, 0);    }    /** * The Bitmap is transformed into a String * @param bitmap * @return String */    public String getStringWithBitmap(Bitmap bitmap)      {          ByteArrayOutputStream baos = new ByteArrayOutputStream();          bitmap.compress(CompressFormat.PNG, 100, baos);          byte[] appicon = baos.toByteArray();         return Base64.encodeToString(appicon, Base64.DEFAULT);      }    /** * According to the image path, the image is transformed into a String * @param url * @return String */    public String getStringWithImageUrl(String url)      {          Bitmap mBitmap=BitmapFactory.decodeFile(url);        mBitmap=zipImage(mBitmap, 200, 200);        ByteArrayOutputStream baos = new ByteArrayOutputStream();         mBitmap.compress(CompressFormat.PNG, 100, baos);          byte[] appicon = baos.toByteArray();          return Base64.encodeToString(appicon, Base64.DEFAULT);      }    /** * The compressed image * @param bgimage * @param newWidth * @param newHeight * @return Bitmap */    public Bitmap zipImage(Bitmap bgimage, double newWidth,            double newHeight) {        float width = bgimage.getWidth();        float height = bgimage.getHeight();        Matrix matrix = new Matrix();        float scaleWidth = ((float) newWidth) / width;        float scaleHeight = ((float) newHeight) / height;        matrix.postScale(scaleWidth, scaleHeight);        Bitmap bitmap = Bitmap.createBitmap(bgimage, 0, 0, (int) width,                (int) height, matrix, true);        return bitmap;    }}

Http请求响应类封装解析：

import java.io.Serializable;import java.util.ArrayList;import com.example.http.RespMessage;/** * Request response bean * Created by LanYan on 2015/11/17. */public class ResponseBean extends RespMessage implements Serializable {    /** * */    private static final long serialVersionUID = -3190468559588437672L;    private boolean hasNext;    public boolean isHasNext() {        return hasNext;    }    public void setHasNext(boolean hasNext) {        this.hasNext = hasNext;    }    public <T> T getResultObject(Class<T> cls) {        return GsonHelper.getInstance().fromJsonObject(getData(), cls);    }    public <T> ArrayList<T> getResultList(Class<T> cls) {        ArrayList<T> mList = GsonHelper.getInstance().fromJsonList(getData(),                cls);        setHasNext(hasNextPage(mList));        return mList;    }    public static long getSerialversionuid() {        return serialVersionUID;    }    public boolean getStatus() {        return "00000000".equals(getRespCode()) ? true : false;    }    public <T> boolean hasNextPage(ArrayList<T> mList) {        if (mList == null || mList.size() < 10) {            return false;        } else {            return true;        }    }}

封装可读性接口：

/** * Created by LanYan on 2015/11/17. */public enum Iinterface {    login(    /** 登录*/    "login",    /** 登录账户、密码 */    new String[]{            /**登录手机号(需要MD5)*/            "userName",            /**登录密码*/            "password"    }),    loading(            /**启动界面Loading初始数据*/            "",            null    );    private Iinterface(String requestUrl,            String[] postKey) {        this.postKey = postKey;        this.requestUrl = requestUrl;    }    private String requestUrl;    private String[] postKey = null;    public static final int ipIndex=23;    public static final String host = "http://192.168.3."+ipIndex+":8080/xxxx/";    public String[] getRequestpostKey() {        return postKey;    }    public String getRequestUrl() {        return host + requestUrl;    }}

SharedPeference简单封装：

import java.util.ArrayList;import android.annotation.SuppressLint;import android.app.Activity;import android.content.Context;import android.content.SharedPreferences;import android.content.SharedPreferences.Editor;import com.huianrong.app.http.GsonHelper;@SuppressLint("CommitPrefEdits")public class SharedPeferenceManager {    private static SharedPeferenceManager instance;    private static Context mContext;    public SharedPeferenceManager() {    }    public static SharedPeferenceManager getInstance(Context context) {        mContext = context;        if (instance == null) {            synchronized (SharedPeferenceManager.class) {                if (instance == null) {                    instance = new SharedPeferenceManager();                }            }        }        return instance;    }    public <T> T readObject(String tableName, String key, Class<T> cls) {        String json = null;        json = getSharedPreference(tableName).getString(key, null);        return json==null?null:GsonHelper.getInstance().fromJsonObject(json, cls);    }    public <T> ArrayList<T> readList(String tableName,String key, Class<T> cls) {        String json = null;        json = getSharedPreference(tableName).getString(key, null);        return GsonHelper.getInstance().fromJsonList(json, cls);    }    public <T> void saveOrUpdateObject(String tableName, String key, T t) {        addObject(tableName, key, t, null);    }    public <T> void saveOrUpdateList(String tableName, String key,            ArrayList<T> mList) {        addList(tableName, key, mList, null);    }    public <T> void addObject(String tableName, String key, T t,            Class<T> cls) {        SharedPreferences mSharedPreferences =getSharedPreference(tableName);        Editor mEditor=getEditor(mSharedPreferences);        if(cls==null){            mEditor.putString(key, GsonHelper.getInstance().toJson(t));        }else {            String requestJson=mSharedPreferences.getString(key, null);            ArrayList<T> mList=new ArrayList<T>();            if(requestJson!=null){                mList=GsonHelper.getInstance().fromJsonList(requestJson, cls);            }            mList.add(t);            mEditor.putString(key, GsonHelper.getInstance().toJson(mList));        }        mEditor.commit();    }    public <T> void addList(String tableName, String key,            ArrayList<T> list, Class<T> cls) {        SharedPreferences mSharedPreferences =getSharedPreference(tableName);        Editor mEditor=getEditor(mSharedPreferences);        if(cls==null){            mEditor.putString(key, GsonHelper.getInstance().toJson(list));        }else {            String requestJson=mSharedPreferences.getString(key, null);            ArrayList<T> mList=new ArrayList<T>();            if(requestJson!=null){                mList=GsonHelper.getInstance().fromJsonList(requestJson, cls);            }            mList.addAll(list);            mEditor.putString(key, GsonHelper.getInstance().toJson(mList));        }        mEditor.commit();    }    public SharedPreferences getSharedPreference(String tableName) {        return mContext.getSharedPreferences(tableName, Activity.MODE_PRIVATE);    }    public Editor getEditor(String tableName) {        return getSharedPreference(tableName).edit();    }    public Editor getEditor(SharedPreferences mSharedPreferences) {        return mSharedPreferences.edit();    }}

下面该是BaseFragment了：

import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentActivity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.view.animation.Animation;import com.lidroid.xutils.ViewUtils;/** * Created by LanYan on 2015/11/17. */public abstract class BaseFragment extends Fragment {    View contentView;    protected FragmentActivity activity;    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {        if(contentView==null){            contentView=inflater.inflate(setContentViewId(),null);            ViewUtils.inject(this,contentView);            initiazed();        }        return contentView;    }    @Override    public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) {        return super.onCreateAnimation(transit, enter, nextAnim);    }    /** * onCreateView>inflater.inflate(setContentViewId(),null); * @return R.layout.xx */    protected abstract int setContentViewId();    /** * Initiazetion options */    protected void initiazed(){        activity=(BaseFragmentActivity)getActivity();    }}

有了一系列的基类可以帮助我们简化开发，下面是一个小的simple:

import android.os.Bundle;import android.support.design.widget.FloatingActionButton;import android.support.design.widget.Snackbar;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;import android.view.View;import android.view.Menu;import android.view.MenuItem;import android.view.Window;import android.view.WindowManager;import com.huianrong.app.base.BaseFragmentActivity;import com.huianrong.app.fragment.LoadingFragment;public class SplashActivity extends BaseFragmentActivity {    @Override    public void applyTheme() {        super.applyTheme();        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);    }    /** * When the activity call the setContentView (int layout) method, this method is called to return to the layout * 当activity 调用setContentView（int layout） 方法时，调用此方法返回Layout * * @return R.layout.xx */    @Override    public int setContentViewId() {        return R.layout.activity_splash;    }    @Override    public void initiazed() {        super.initiazed();        replaceFragment(R.id.splash_frameLayout,LoadingFragment.class);    }}

下面是一个基于xutils http模块重新打包封装后的一个post请求实例：

        InterfaceManager manager=InterfaceManager.getInstance();        manager.login(new String[]{"15828845121","12345"}, new HuiRequestCallBack() {            @Override            public void huiSuccess(ResponseBean response) {                UserBean mUserBean=response.getResultObject(UserBean.class);            }            @Override            public void huiFailure(Exception e, String message) {            }        });

零零乱乱的一地思绪，总结出：开发需要Fragment系列：BaseFragmentActivity、BaseFragment、FragmentHelper，Activity系列：BaseActivity、BaseView、BaseDialogFragment、BasePopupWindow、（弹出视图通过BaseView获取View视图传入弹出视图例如BaseDialogFragment等）、BaseBean等待；还需要辅助工具类：CheckInputHelper、CacheHelper等。同时Http网络请求模块需要封装请求，图片注意缓存，那么写好这些东西，考虑清楚项目需求就可以进入开发了，当开发的app程序多了，就会发现很多通用功能，而且每个app的更新会让用户体验不好，我们就应该考虑插件化开发，模块化。我不知道我的技术目前还在什么阶段，但是我知道我还是个菜逼，哎，大腿难求！！

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