Android 自定义加载等待Dialog

• 效果图
  
• 布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@android:color/transparent"
    android:gravity="center"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="120dp"
        android:layout_height="120dp"
        android:background="#333333"
        android:gravity="center"
        android:orientation="vertical" >

        <ProgressBar
            android:id="@+id/progressBar1"
            style="?android:attr/progressBarStyleInverse"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:indeterminateBehavior="repeat"
            android:indeterminateDrawable="@drawable/anim_loading"
            android:background="@android:color/transparent" />

        <TextView
            android:id="@+id/tv_message"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:paddingTop="10dp"
            android:text="Message"
            android:textColor="@color/white"
            tools:ignore="HardcodedText" />
    </LinearLayout>

</LinearLayout>

在res下新建anim文件夹，新建anim_loading.xml文件

<?xml version="1.0" encoding="utf-8"?>
<animated-rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:drawable="@drawable/icon_loading"
    android:fromDegrees="0.0"
    android:pivotX="50.0%"
    android:pivotY="50.0%"
    android:toDegrees="360.0" />

在res下drawable文件夹下新建dialog_round.xml文件

<?xml version="1.0" encoding="utf-8"?>
    <!--shape用于定义形状，有四种形状(矩形rectangle| 椭圆oval | 直线line | 圆形ring)-->
    <!--solid用于设置填充形状的颜色-->
    <!--corners用于创建圆角（只用于形状是矩形）-->
    <shape xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="rectangle">
             <solid android:color="#333333"/>
             <corners
                 android:topLeftRadius="8dip"
                 android:topRightRadius="8dip"
                 android:bottomLeftRadius="8dip"
                 android:bottomRightRadius="8dip"/>
    </shape>

• 附图片
  
• 新建LoadProgressDialog 继承Dialog

import android.annotation.SuppressLint;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.TextView;

public class LoadProgressDialog extends Dialog {
    private String message;
    private boolean canCancel;
    private TextView textView;

    public LoadProgressDialog(Context context, String message) {
        this(context, message, true);
    }

    public LoadProgressDialog(Context context, String message, boolean canCancel) {
        super(context, R.style.LoadProgressDialog);
        this.message = message;
        this.canCancel = canCancel;
    }

    public void setMessage(String message) {
        this.message = message;
        handler.sendEmptyMessage(0);
    }

    @SuppressLint("HandlerLeak")
    private
    Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            if (msg.what == 0) {
                textView.setText(message);
            }
        }
    };

    @SuppressLint("ResourceType")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.dialog_loadprogress);
        textView = findViewById(R.id.tv_message);
//        setCancelable(canCancel);
        setCanceledOnTouchOutside(canCancel);
        textView.setText(message);
    }
}

解决圆角宽度留白问题
新建style样式，在构造的时候调用即可：super(context, R.style.LoadProgressDialog);

<style name="LoadProgressDialog" parent="Theme.AppCompat.Dialog">
    <item name="android:backgroundDimEnabled">true</item><!-- 模糊 -->
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:backgroundDimAmount">0.6</item><!-- 灰度 -->
    <!--Dialog图标着色-->
    <!--<item name="colorAccent">#ffffff</item>-->
</style>

• 使用示例

import android.app.Activity;
import android.os.Bundle;
import android.support.annotation.Nullable;

public class DemoActivity extends Activity{

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
		//创建LoadProgressDialog 
        LoadProgressDialog loadProgressDialog=new LoadProgressDialog(DemoActivity.this,"登录中……");
        
        //显示
        loadProgressDialog.show();

        //更改message
        loadProgressDialog.setMessage("加载数据中……");

        //销毁
        loadProgressDialog.dismiss();
    }
}