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  • Android Market的 Loading效果

    在Android中,要实现Loading效果,一般情况下都使用ProgressDialog控件。ApiDemos/src/com/example/android/apis/view/ProgressBar3.java 提供两个demo:
    Progressbar show Indeterminate
    progressbar show Indeterminate No Title
    仔细看了Android Market,发现却是不一样的,请看截图:
    那到底如何实现呢?首先,我们创建一个布局文件,
    res/layout/fullscreen_loading_indicator.xml, 其内容如下:
    
    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:gravity="center_vertical|center_horizontal"
        android:orientation="horizontal"
        android:id="@+id/fullscreen_loading_indicator"
        android:visibility="gone"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        >
        <ProgressBar
            android:layout_gravity="center_vertical"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            style="?android:attr/progressBarStyleSmall"
            >
        </ProgressBar>
        <TextView
            android:id="@+id/current_action"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5.0dip"
            android:text="@string/loading"
            >
        </TextView>
    </LinearLayout>
    
    然后在main.xml 把它include 进来
    
    <?xml version="1.0" encoding="utf-8"?>
    <FrameLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        >
        <LinearLayout
            android:orientation="vertical"
            android:id="@+id/main_info"
            android:visibility="gone"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            >
        </LinearLayout>
        <include
            android:visibility="visible"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            layout="@layout/fullscreen_loading_indicator"
            >
        </include>
    </FrameLayout>
    
    主程序 Loading.java:
    package org.lytsing.android.loading;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.widget.LinearLayout;
    
    public class Loading extends Activity {
    
        private LinearLayout mLoadingLayout;
    
        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
    
            // TODO: dismiss the loading, use this snippet code.
            //mLoadingLayout = (LinearLayout)findViewById(R.id.fullscreen_loading_indicator);
            //mLoadingLayout.setVisibility(View.GONE);
        }
    }
    运行的效果为:
     
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  • 原文地址:https://www.cnblogs.com/firecode/p/2666629.html
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