第一部分7-3一个工程代码

1、1.5 代码中间有分号1.5 代码中间有分号 xml alt+/可以提示后续内容 xml 区分大小写代码输入自动提规范化代码格代码显示大小调2 一个返回系统值的按钮功能代码显示大小调2 一个返回系统值的按钮功能 importimportandroid.support.v4.app.Fragment; import android.os.Bundle; import ;import import android.view.ViewGroup;import import publicclassMainActivityButtonbtn=ionBarActivity btn=(Button) pub

2、licvoidonClick(Viewbtn=(Button) publicvoidonClick(Viewarg0)/TODOAuto-generatedmethodln(你点击了ife= 3 建立一个点击按钮会在文本框返回时内 import importandroid.support.v4.app.Fragment; import android.os.Bundle; import 3 建立一个点击按钮会在文本框返回时内 import importandroid.support.v4.app.Fragment; import android.os.Bundle; import ;impor

3、t import android.view.ViewGroup;import android.widget.Button; import publicclassMainActivityionBarActivity super.onCreate(savedInstan btn=(Button) publicvoidonClick(Viewarg0)/TODOAuto-generatedmethodln(o+newife= ()/Inflate;thisaddsitemstotheactionbarifitisreturn ()/Inflate;thisaddsitemstotheactionba

4、rifitisreturn Itemitem)/Handleactionbaritemclickshere.Theactionbar/automaticallyhandleclicksontheHome/Upbutton,so/asyouspecifyaparentactivityinAndroidManifest.xml. id = item.getItemId();returnreturn*Aplaceholderfragmentcontainingasimple icclassPlaceholderFragmentextendsFragment Bundlee)return 4 , 嘛？

5、 import , 嘛？ import import import android.app.Activity;import import ;import import import import android.widget.Button; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast;import publicclassMainActivityimport import android.widget.Button; import android.widg

6、et.ImageView; import android.widget.TextView; import android.widget.Toast;import publicclassMainActivity btn1 = (Button) findViewById(R.id.button1); public void onClick(View arg0) 点嘛？5 按钮切换5.1 MainActivity.java-package 5 按钮切换5.1 MainActivity.java-package ;classMainActivityivityView.OnClickListenerBu

7、ttonclassMainActivityivityView.OnClickListenerButtonbtn1Buttonbtn2ImageViewindex=0; imgs = protectedvoidonCreate(Bundle btn1=(Button)findViewById(R.id.button1); btn2= (Button)img=(ImageView)findViewById(R.id.imageView1); public voidonClick(View arg0)switch(arg0.getId() case R.id.button1: if (index =

8、 imgs.length) 写法public void onClick(View arg0)if(arg0.getId()=R.id.button1) else if(arg0.getId() =写法public void onClick(View arg0)if(arg0.getId()=R.id.button1) else if(arg0.getId() =if (index = imgs.length) 5.2 activity_main.xml-线性布relativeLayout相对布框适配LinearLayout HYPERLINK http:/s/ HYPERLINK http:/

9、s/ ion=verticalandroid:text=第一张 android:text=第一张 android:text=下一张 6 ArrayAdapter 适配6.1 MainActivity.java- import importandroid.app.ActionBar; importandroid.app.Fragment; import android.os.Bundle; import importandroid.view. importandroid.view.View;import android.widget.Button; import android.widget.E

10、ditText; import android.widget.ImageView; import android.widget.Toast;6.1 MainActivity.java- import importandroid.app.ActionBar; importandroid.app.Fragment; import android.os.Bundle; import importandroid.view. importandroid.view.View;import android.widget.Button; import android.widget.EditText; impo

11、rt android.widget.ImageView; import android.widget.Toast;import publicclassMainActivityButton btn = null; ImageViewimg= EditTextetpwd=ivityimplementsView.OnClickListenerindex=egerimgs=R.drawable.i0,R.drawable.i1,R.drawable.i2,R.drawable.i4 at = new ArrayAdapteretUserName = (EditText) findViewById(R.id.etUserName);img=(ImageView)btn = (Button) findViewById(R.id.button1); publicvoidonClick(Viewimg=(ImageView)btn = (Button) findViewById(R.id.button1); publicvoidonClick(Viewegerii=String pwd = etpwd.getText().toString(); Toast