Android 网络加载通用Loading

为了用户体验用好，App在网络请求时通常都会显示个进度显示圈圈，提示用户耐心等待，最脍炙人口的莫过于登录啦。

接下来我们就通过Dialog来实现，然后在BaseActivity，BaseFragment中提供方法供调用

先看看自定义的dialog

package com.example.kbr.utils;

import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.widget.AppCompatImageView;
import android.view.animation.Animation;
import android.widget.ImageView;

/**
 * Created by keranbin on 2017/12/19.
 */

public class LoadingDialog extends Dialog {
    private ObjectAnimator objectAnimator = null;
    private AppCompatImageView circle;
    private long duration = 2000;

    public LoadingDialog(@NonNull Context context) {
        super(context);
    }

    public LoadingDialog(@NonNull Context context, int themeResId) {
        super(context, themeResId);
    }

    protected LoadingDialog(@NonNull Context context, boolean cancelable, @Nullable OnCancelListener cancelListener) {
        super(context, cancelable, cancelListener);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.dialog_loading);
    }


    @Override
    public void show() {
        super.show();
        startAnim();
        setOnDismissListener(dialog -> {
            endAnim();
        });
    }

    /**
     * 启动动画
     */
    private void startAnim() {
        setCanceledOnTouchOutside(false);
        circle = findViewById(R.id.loading);
        objectAnimator = ObjectAnimator.ofFloat(circle, "rotation", 0.0f, 360.0f);
        //设置动画时间
        objectAnimator.setDuration(duration);
        //设置动画重复次数，这里-1代表无限
        objectAnimator.setRepeatCount(Animation.INFINITE);
        //设置动画循环模式。
        objectAnimator.setRepeatMode(ValueAnimator.RESTART);
        objectAnimator.start();
    }


    /**
     * 结束动画
     */
    private void endAnim() {
        objectAnimator.end();
        objectAnimator = null;
        circle = null;
    }

}

布局也非常简单

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:alpha="0.4"
    android:background="#000000"
    android:gravity="center"
    android:orientation="vertical"
    android:paddingBottom="20dp"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:paddingTop="20dp">

    <android.support.v7.widget.AppCompatImageView
        android:id="@+id/loading"
        android:layout_width="48dp"
        android:layout_height="48dp"
        app:srcCompat="@drawable/loading" />
</RelativeLayout>

BaseActivity,BaseFragment中提供方法

    private LoadingDialog dialog;


    public void showLoading(){
        if (dialog == null) {
            dialog = new LoadingDialog(this);
        }
        dialog.show();
    }


    public void clearLoading(){
        if (dialog != null) {
            dialog.dismiss();
        }
    }

在需要用到的地方调用即可

 showLoading();

        //执行网络耗时任务（这里时模拟）
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    Thread.sleep(10000);
                    clearLoading();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }).start();