android学习系列-控件用法（2）1

1.         ListView

JAVA代码

package tjuci.edu.dl;

import android.app.Activity;

import android.os.Bundle;

import android.widget.ArrayAdapter;

import android.widget.ListView;

publicclass ListViewSampleActivityextends Activity {

    /** Called  when the activity is first created. */

    @Override

    publicvoid onCreate(Bundle  savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        String[] str = {"aaaa","bbbbbb","cccccc","vvvvvvvv","ddd","ee"};

        ListView listView =  (ListView)findViewById(R.id.lsitview);

        ArrayAdapter<String> arrAdapter  =new ArrayAdapter<String>(this,android.R.layout.simple_list_item_multiple_choice,str);

        listView.setAdapter(arrAdapter);

    }

}

XML代码

<?xmlversion="1.0" encoding="utf-8"?>

<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"

     android:layout_width="fill_parent"

     android:layout_height="fill_parent"

     android:orientation="vertical" >

    <ListView

        android:id="@+id/lsitview"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"/>

</LinearLayout>

效果

2.        TableLayout

JAVA代码

package tjuci.edu.dl;

import android.app.Activity;

import android.os.Bundle;

publicclass RegTableActivityextends Activity {

    /** Called  when the activity is first created. */

    @Override

    publicvoid onCreate(Bundle  savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

    }

}

XML代码

<?xmlversion="1.0" encoding="utf-8"?>

<TableLayoutxmlns:android="http://schemas.android.com/apk/res/android"

     android:id="@+id/root"

     android:layout_width="fill_parent"

     android:layout_height="fill_parent"

     android:orientation="vertical" >

<TableRow>

    <TextView

        android:id="@+id/tv1"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:textSize="25pt"

        android:background="@drawable/bg_border"

        android:text="用户名"/>

    <EditText

        android:id="@+id/et1"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:hint="请输入用户名"

        android:selectAllOnFocus="true"/>

</TableRow>

<TableRow>

    <TextView

        android:id="@+id/tv2"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:textSize="25pt"

        android:text="密码"/>

    <EditText

        android:id="@+id/et2"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:password="true"/>

</TableRow>

<TableRow>

    <TextView

        android:id="@+id/tv3"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:textSize="25pt"

         android:text="电话"/>

    <EditText

        android:id="@+id/et3"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:selectAllOnFocus="true"

        android:phoneNumber="true"/>   

</TableRow>

    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="注册"

        />"

</TableLayout>

效果

3.        LinearLayout

效果

JAVA代码

package tjuci.edu.dl;

import android.app.Activity;

import android.content.Intent;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

publicclass DataSampleextends Activity {

    /** Called  when the activity is first created. */

    @Override

    publicvoid onCreate(Bundle  savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        Button btn =  (Button)findViewById(R.id.btn1);

        btn.setOnClickListener(new  View.OnClickListener() {

            @Override

            publicvoid onClick(View v) {

                Intent intent = new Intent();

                String data = "http://www.baidu.com";

                Uri uri = Uri.parse(data);

                intent.setAction(intent.ACTION_VIEW);

                intent.setData(uri);

                startActivity(intent);

            }

        });

        Button btn2 =  (Button)findViewById(R.id.btn2);

        btn2.setOnClickListener(new  View.OnClickListener() {

            @Override

            publicvoid onClick(View v) {

                Intent intent = new Intent();

                String data = "tel:18611991643";

                Uri uri = Uri.parse(data);

                intent.setAction(intent.ACTION_DIAL);

                intent.setData(uri);

                startActivity(intent);

            }

        });

    }

}

XML代码

<?xmlversion="1.0" encoding="utf-8"?>

<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"

     android:layout_width="fill_parent"

     android:layout_height="fill_parent"

     android:orientation="vertical" >

    <Button

        android:id="@+id/btn1"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="查看www.baidu.com"/>

<Button

        android:id="@+id/btn2"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="拨打电话：13321366513"/>

</LinearLayout>

4.        GridView

效果

JAVA代码

package tjuci.edu.dl;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.GridView;

import android.widget.TextView;

publicclass XmlValuesSampleActivityextends Activity {

    //定义颜色中的文字

    private String[]words;

    /** Called  when the activity is first created. */

    @Override

    publicvoid onCreate(Bundle  savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        //注：定义数组的元素 应该在onCreate方法内进行  不能再外面

        //根据Activity的生命周期可知：onCreate方法在创造Activity时被调用

        words = XmlValuesSampleActivity.this.getResources().getStringArray(R.array.words);

        BaseAdapter ba = new BaseAdapter() {

            @Override

            public View getView(int position, View  convertView, ViewGroup parent) {

                //TODO Auto-generated method stub

                TextView tv = new  TextView(XmlValuesSampleActivity.this);

                tv.setWidth((int)  XmlValuesSampleActivity.this.getResources().getDimension(R.dimen.cell_width));

                tv.setHeight((int)XmlValuesSampleActivity.this.getResources().getDimension(R.dimen.cell_height));

                tv.setText(words[position]);

                tv.setBackgroundDrawable((XmlValuesSampleActivity.this.getResources().obtainTypedArray(R.array.colors)).getDrawable(position));

                tv.setTextSize(20);

                return tv;

            }

            @Override

            publiclong getItemId(int position) {

                //TODO Auto-generated method stub

                return position;

            }

            @Override

            public Object getItem(int position) {

                //TODO Auto-generated method stub

                returnwords[position];

            }

            @Override

            publicint getCount() {

                //TODO Auto-generated method stub

                returnwords.length;

            }

        };

        GridView gv =  (GridView)findViewById(R.id.gView);

        gv.setAdapter(ba);

    }

}

XML代码

<?xmlversion="1.0" encoding="utf-8"?>

<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"

     android:layout_width="fill_parent"

     android:layout_height="fill_parent"

     android:orientation="vertical" >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="@string/title" 

        android:textSize="@dimen/font_size"/>

    <GridView

        android:id="@+id/gView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:horizontalSpacing="@dimen/spacing"

        android:verticalSpacing="@dimen/spacing"

        android:numColumns="3"

        android:gravity="center"

        />

</LinearLayout>

5.        VideoView

效果

JAVA代码

package tjuci.edu.dl;

import java.io.File;

import android.app.Activity;

importandroid.graphics.PixelFormat;

import android.os.Bundle;

import android.widget.MediaController;

import android.widget.VideoView;

/**

 * Description:

 * <br/>site: <a href="http://www.crazyit.org">crazyit.org</a>

 * <br/>Copyright (C), 2001-2012, Yeeku.H.Lee

 * <br/>This program is protected by  copyright laws.

 * <br/>Program Name:

 * <br/>Date:

 * @author  Yeeku.H.Lee kongyeeku@163.com

 * @version  1.0

 */

publicclass VedioViewTestextends Activity

{

    VideoView videoView;

    MediaController mController;

    @Override

    publicvoid onCreate(Bundle  savedInstanceState)

    {

        super.onCreate(savedInstanceState);

//      getWindow().setFormat(PixelFormat.TRANSLUCENT);

        setContentView(R.layout.main);

        //获取界面上VideoView组件

        videoView = (VideoView) findViewById(R.id.video);

        //创建MediaController对象

        mController =new MediaController(this);

        File video = new File("/mnt/sdcard/test.mp4");

        if(video.exists())

        {

            videoView.setVideoPath(video.getAbsolutePath());

            //设置videoView与mController建立关联

            videoView.setMediaController(mController);

            //设置mController与videoView建立关联

            mController.setMediaPlayer(videoView);

            //让VideoView获取焦点

            videoView.requestFocus();

        }

    }

}

XML代码

<?xmlversion="1.0" encoding="utf-8"?>

<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"

     android:layout_width="fill_parent"

     android:layout_height="fill_parent"

     android:orientation="vertical" >

  <!--定义VideoView播放视频 -->

<VideoView

    android:id="@+id/video"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    />

</LinearLayout>