Android 自定義一款炫酷的加載控件

概述

在設計應用的時候，我們應該熱愛極簡主義，簡單就是好的，對於很多用戶來說，復雜的東西並不受歡迎。
我要實現的是根據不同的情況去顯示不同的加載效果，隨用隨調，效果是借鑒於某一項目的效果，我認為有必要提取出來改善封裝一下，供以後使用。情況大致分為：加載中、無網絡、無數據、加載失敗等；

預覽下效果圖：

我們怎麼實現這種效果呢
view_loading.xml的布局如下：

<framelayout android:layout_height="match_parent" android:layout_width="match_parent" xmlns:android="http://schemas.android.com/apk/res/android">

    

        

        

    


    

        

        


        </framelayout>

    

從布局來看，我分了兩個部分，一個是加載中，另外一個是帶有ImagView、文字和按鈕的布局，有人看到這，就會說，哇靠，這不是很簡單嗎？根據不同的情況去設置Visibility的值就好了啊，沒錯，原理就是這樣。

XHLoadingView.java的代碼如下：

package com.woyou.loadingdemo.widget;

import android.content.Context;
import android.graphics.drawable.AnimationDrawable;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.woyou.loadingdemo.LoadingState;
import com.woyou.loadingdemo.R;


/**
 * Created by Xiho on 11:21.
 */
public class XHLoadingView extends FrameLayout {

    private Context mContext;
    // 加載中的布局
    private LinearLayout mLinearLoad;
    //其他加載的布局
    private LinearLayout mLinearLoading;

    private TextView mTvLoading;

    private TextView mTvLoad;

    private ImageView mIvLoading;

    private ImageView mIvLoad;

    private Button mBtnLoad;

    private LoadingState mState;

    private AnimationDrawable animation;


    public XHLoadingView(Context context) {
        super(context);
        mContext = context;
    }

    public XHLoadingView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
    }

    public XHLoadingView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mContext = context;
    }

    public XHLoadingView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        mContext = context;

    }
    public void build(){
        LayoutInflater.from(mContext).inflate(R.layout.view_loading, this, true);

        mLinearLoading = (LinearLayout) findViewById(R.id.lin_loading);

        mLinearLoad = (LinearLayout) findViewById(R.id.lin_load);

        mIvLoading = (ImageView) findViewById(R.id.img_loading);

        mIvLoad = (ImageView) findViewById(R.id.iv_load);

        mTvLoading = (TextView) findViewById(R.id.tv_loading);

        mTvLoad = (TextView) findViewById(R.id.tv_load);

        mBtnLoad = (Button) findViewById(R.id.btn_load);

        mBtnLoad.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                setState(LoadingState.STATE_LOADING);
                mOnRetryListener.onRetry();
            }
        });

    }


    @Override
    public void setVisibility(int visibility) {
        super.setVisibility(visibility);
        if(View.GONE==visibility && mState==LoadingState.STATE_LOADING && animation!=null&&animation.isRunning()){
            animation.stop();
        }
    }

    /**
     * 加載中提示文字
     */
    private String mLoadingText;
    private int mLoadingIcon;
    public XHLoadingView withLoadingIcon(int resId){
        mLoadingIcon = resId;
        return this;
    }

    /**
     * 加載數據為空提示文字
     */
    private String mLoadEmptyText;
    private int mLoadEmptyIcon;
    public XHLoadingView withEmptyIcon(int resId){
        mLoadEmptyIcon = resId;
        return this;
    }

    /**
     * 無網絡提示
     */
    private String mLoadNoNetworkText;
    private int mNoNetworkIcon;
    public XHLoadingView withNoNetIcon(int resId){
        mNoNetworkIcon = resId;
        return this;
    }

    private OnRetryListener mOnRetryListener;

    /**
     * 定義重試的的接口
     */
    public interface OnRetryListener {
        void onRetry();
    }

    public XHLoadingView withOnRetryListener(OnRetryListener mOnRetryListener){
        this.mOnRetryListener = mOnRetryListener;
        return this;
    }

    /**
     *  設置加載的狀態
     * @param state
     */
    public void setState(LoadingState state){
        if(mState==state){
            return;
        }else if(state==LoadingState.STATE_LOADING){
            mLinearLoading.setVisibility(VISIBLE);
            mLinearLoad.setVisibility(GONE);
        }else if(state!=LoadingState.STATE_LOADING){
            mLinearLoading.setVisibility(GONE);
            mLinearLoad.setVisibility(VISIBLE);
            if(animation!=null && mState==LoadingState.STATE_LOADING)
                animation.stop();
        }
        changeState(state);
    }


    public boolean btnEmptyEnable = true;
    public boolean btnErrorEnable = true;
    public boolean btnNoNetworkEnable = true;

    public XHLoadingView withBtnNoNetEnnable(boolean ennable) {
        btnNoNetworkEnable = ennable;
        return this;
    }

    public XHLoadingView withBtnErrorEnnable(boolean ennable) {
        btnErrorEnable = ennable;
        return this;
    }


    public XHLoadingView withBtnEmptyEnnable(boolean ennable) {
        btnEmptyEnable = ennable;
        return this;
    }

    /**
     * 改變狀態
     * @param state
     */
    private void changeState(LoadingState state) {
        switch (state) {
            //加載中
            case STATE_LOADING:
                mState = LoadingState.STATE_LOADING;
                mIvLoading.setImageResource(mLoadingIcon);
                mTvLoading.setText(mLoadingText);
                if (animation == null) {
                    animation = (AnimationDrawable) mIvLoading.getDrawable();
                }
                if (animation != null)
                    animation.start();
                break;
            //數據為空
            case STATE_EMPTY:
                mState = LoadingState.STATE_EMPTY;
                mIvLoad.setImageResource(mLoadEmptyIcon);
                mTvLoad.setText(mLoadEmptyText);
                if (btnEmptyEnable) {
                    mBtnLoad.setVisibility(VISIBLE);
                    mBtnLoad.setText(btn_empty_text);
                } else {
                    mBtnLoad.setVisibility(GONE);
                }
                break;
            //加載失敗
            case STATE_ERROR:
                mState = LoadingState.STATE_ERROR;
                mIvLoad.setImageResource(mErrorIco);
                mTvLoad.setText(mLoadErrorText);
                if (btnErrorEnable) {
                    mBtnLoad.setVisibility(VISIBLE);
                    mBtnLoad.setText(btn_error_text);
                } else {
                    mBtnLoad.setVisibility(GONE);
                }
                break;
            //無網絡
            case STATE_NO_NET:
                mState = LoadingState.STATE_NO_NET;
                mIvLoad.setImageResource(mNoNetworkIcon);
                mTvLoad.setText(mLoadNoNetworkText);
                if (btnNoNetworkEnable) {
                    mBtnLoad.setVisibility(VISIBLE);
                    mBtnLoad.setText(btn_nonet_text);
                } else {
                    mBtnLoad.setVisibility(GONE);
                }
                break;
        }

    }


    /**
     * 後台或者本地出現錯誤提示
     */
    private String mLoadErrorText;
    private int mErrorIco;

    public XHLoadingView withErrorIco(int resId) {
        mErrorIco = resId;
        return this;
    }

    /**
     * 加載空數據
     * @param resId
     * @return
     */
    public XHLoadingView withLoadEmptyText(int resId) {
        mLoadEmptyText = getResources().getString(resId);
        return this;
    }

    public XHLoadingView withLoadEmptyText(String mLoadEmptyText) {
        this.mLoadEmptyText = mLoadEmptyText;
        return this;
    }

    /**
     *  無網絡時候加載文字
     * @param resId
     * @return
     */
    public XHLoadingView withLoadNoNetworkText(int resId) {
        mLoadNoNetworkText = getResources().getString(resId);
        return this;
    }

    public String btn_empty_text = "重試";
    public String btn_error_text = "重試";
    public String btn_nonet_text = "重試";

    /**
     * 數據為空的Button的文字提示
     * @param text
     * @return
     */
    public XHLoadingView withBtnEmptyText(String text) {
        this.btn_empty_text = text;
        return this;
    }

    /**
     * 加載錯誤的Button的文字提示
     * @param text
     * @return
     */
    public XHLoadingView withBtnErrorText(String text) {
        this.btn_error_text = text;
        return this;
    }

    /**
     * 加載錯誤的文字提示
     * @param resId
     * @return
     */
    public XHLoadingView withLoadErrorText(int resId) {
        this.mLoadErrorText = getResources().getString(resId);
        return this;
    }
    public XHLoadingView withLoadErrorText(String mLoadedErrorText) {
        this.mLoadErrorText = mLoadedErrorText;
        return this;
    }

    /**
     * 加載無網絡的Button的文字提示
     * @param text
     * @return
     */
    public XHLoadingView withBtnNoNetText(String text) {
        this.btn_nonet_text = text;
        return this;
    }

    /**
     * 加載沒有網路的文字提示
     * @param mLoadedNoNetText
     * @return
     */
    public XHLoadingView withLoadNoNetworkText(String mLoadedNoNetText) {
        this.mLoadNoNetworkText = mLoadedNoNetText;
        return this;
    }

    public XHLoadingView withLoadingText(int resId) {
        this.mLoadingText = getResources().getString(resId);
        return this;
    }

    public XHLoadingView withLoadingText(String mLoadingText) {
        this.mLoadingText = mLoadingText;
        return this;
    }

}

針對不同的情況作了不同的處理，然後我們在需要的Activity調用。

    private XHLoadingView mLoadingView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_display);
        mLoadingView = (XHLoadingView) findViewById(R.id.lv_loading);
        mLoadingView.withLoadEmptyText("≥﹏≤ , 啥也木有 !").withEmptyIcon(R.drawable.disk_file_no_data).withBtnEmptyEnnable(false)
                    .withErrorIco(R.drawable.ic_chat_empty).withLoadErrorText("(?( ˙??˙? )?)??????,我家程序猿跑路了 !").withBtnErrorText("臭狗屎!!!")
                    .withLoadNoNetworkText("你擋著信號啦o(￣ヘ￣o)??? 你走").withNoNetIcon(R.drawable.ic_chat_empty).withBtnNoNetText("網弄好了，重試")
                    .withLoadingIcon(R.drawable.loading_animation).withLoadingText("加載中...").withOnRetryListener(new XHLoadingView.OnRetryListener() {
                @Override
                public void onRetry() {
                    SnackbarUtil.show(mLoadingView,"已經在努力重試了",0);
                }
            }).build();
     }

........

  //加載中
      mLoadingView.setVisibility(View.VISIBLE);
      mLoadingView.setState(LoadingState.STATE_LOADING);

 //空數據
      mLoadingView.setVisibility(View.VISIBLE);
      mLoadingView.setState(LoadingState.STATE_EMPTY)
 //無網絡
      mLoadingView.setVisibility(View.VISIBLE);
      mLoadingView.setState(LoadingState.STATE_NO_NET);

 //加載錯誤
      mLoadingView.setVisibility(View.VISIBLE);
      mLoadingView.setState(LoadingState.STATE_ERROR);

.......


   }

上面我是為了展示不同的效果，所以寫了幾個點擊事件呢，實際中不是這樣的，初始化過後，在需要的地方調用OK，
源碼中注釋詳細，就不用再做過多的解釋了吧！

完整代碼：XHLoadingView