实验二--任务一--打招呼

来源：互联网发布：淘宝联盟好用吗编辑：程序博客网时间：2024/06/05 07:02

一.运行效果图

二.主要代码：

1.MainActivity.java

package cn.edu.bzu.helloandroid;    import android.app.Activity;  import android.content.Context;  import android.graphics.drawable.AnimationDrawable;  import android.os.Bundle;  import android.view.Gravity;  import android.view.LayoutInflater;  import android.view.View;  import android.view.View.OnClickListener;  import android.view.ViewGroup;  import android.widget.Button;  import android.widget.EditText;  import android.widget.ImageView;  import android.widget.LinearLayout;  import android.widget.RelativeLayout;  import android.widget.TextView;  import android.widget.Toast;    public class MainActivity extends Activity  {      private Button btnClick;      private EditText etName;      private TextView textView;                    @Override      protected void onCreate(Bundle savedInstanceState)      {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main) ;          btnClick=(Button) findViewById(R.id.btnClick);          btnClick.setOnClickListener(new ClickHandler());          etName=(EditText) findViewById(R.id.etName);      }                   class ClickHandler implements OnClickListener      {                  @Override          public void onClick(View view)          {              String  name=etName.getText().toString();              Toast toast=Toast.makeText(getApplicationContext(), "hello"+name,Toast.LENGTH_LONG);               toast.setGravity(Gravity.CENTER, 0, 400);               ImageView imageView= new ImageView(getApplicationContext());               imageView.setImageResource(R.drawable.smile);               LinearLayout toastView = (LinearLayout) toast.getView();               toastView.setOrientation(LinearLayout.HORIZONTAL);               toastView.addView(imageView, 0);               toast.show();          }      }  }

2.布局代码

<?xml version="1.0" encoding="utf-8"?>  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"      android:layout_width="match_parent"      android:layout_height="match_parent"  [html] view plain copyandroid:background="@drawable/bg" <span style="font-family: Arial, Helvetica, sans-serif;"> ></span>  [html] view plain copy    <EditText          android:id="@+id/etName"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:layout_alignParentRight="true"          android:layout_alignParentTop="true"          android:layout_marginRight="82dp"          android:layout_marginTop="74dp"          android:background="@android:drawable/edit_text"          android:drawableLeft="@drawable/name"          android:ems="10"          android:hint="@string/etNamePrompt" >          <requestFocus />      </EditText>             <Button          android:id="@+id/btnClick"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:layout_alignLeft="@+id/etName"          android:layout_below="@+id/etName"          android:layout_marginLeft="60dp"          android:layout_marginTop="40dp"          android:background="@drawable/handok"           />    </RelativeLayout>

3.配置文件

<?xml version="1.0" encoding="utf-8"?>  <manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="cn.edu.bzu.helloandroid"      android:versionCode="1"      android:versionName="1.0" >        <uses-sdk          android:minSdkVersion="14"          android:targetSdkVersion="19" />        <application          android:allowBackup="true"          android:icon="@drawable/ic_launcher"          android:label="@string/app_name"          android:theme="@style/AppTheme" >          <activity android:name="cn.edu.bzu.helloandroid.MainActivity" >              <intent-filter>                  <action android:name="android.intent.action.MAIN" />                  <category android:name="android.intent.category.LAUNCHER" />              </intent-filter>          </activity>      </application>    </manifest>

三.实验总结

本次实验的主要任务就是自定义一个toast，因为原生的toast不能满足要求。本次实验要实现的toast效果是：四角要是圆角，且toast里同时包含图片和文字，图片和文字并排显示，点击imageButton，显示“hello+输入的内容“，且toast显示时间较长。

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