• android意图传參数(四)


    一、依照向导创建一个project,layout的activity_main.xml文件内容例如以下:

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        tools:context=".MainActivity" >
    
        <Button
            android:id="@+id/button"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="意向传參数測试"
          />
    
    </RelativeLayout>

    1)android:layout_width="match_parent" :谷歌把fill_parent改成了与实际效果更符合的match_parent,表示塞满容器,塞的意思就是有多少空间,占用多少空间

    2)android:layout_height="wrap_content" :设置为wrap_content将完整显示其内部的文本和图像。布局元素将依据内容更改大小。

    设置一个视图的尺寸为wrap_content大体等同于设置Windows控件的Autosize属性为True。

    3)android:text :设置button的显示值


    二、在Main函数做意向传參跳转

    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    		button = (Button)this.findViewById(R.id.button);
    		button.setOnClickListener(new View.OnClickListener() {
    			
    			@Override
    			public void onClick(View arg0) {
    				// TODO Auto-generated method stub
    			   <span style="color:#ff0000;">  Intent intent = new Intent(MainActivity.this,OtherActivity.class);
    			     intent.putExtra("name", "Deng");
    			     intent.putExtra("age", 23);
    			     startActivity(intent);</span>
    			}
    		});
    	}
    


    通过startActivity方法启动


    三、新建一个other.xml 和 OtherActivity.class

    <?

    xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/msg" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout>


    public class OtherActivity extends Activity {
    
    	private TextView textview;
    	public OtherActivity(){
    		
    	}
    	protected void onCreate(Bundle savedInstanceState){
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.other);
    		textview = (TextView)this.findViewById(R.id.msg);
    		<span style="color:#ff0000;">Intent intent = getIntent();</span>
    		<span style="color:#ff0000;">String name = intent.getStringExtra("name");
    		int age = intent.getIntExtra("age", 0);</span>
    		textview.setText("name"+name+";"+"age"+age);
    	}
    }

    记得重写onCreate方法以及设置setContentView布局


    四、最后在文件AndroidManifest.xml加入一个activity标签

     <application
            android:allowBackup="true"
            android:icon="@drawable/ic_launcher"
            android:label="@string/app_name"
            android:theme="@style/AppTheme" >
            <activity
                android:name="com.example.android_intent.MainActivity"
                android:label="@string/app_name" >
                <intent-filter>
                    <action android:name="android.intent.action.MAIN" />
    
                    <category android:name="android.intent.category.LAUNCHER" />
                </intent-filter>
            </activity>
        <span style="color:#ff0000;">   <activity
               android:name = ".OtherActivity" 
               /></span>
        </application>

            


  • 相关阅读:
    ORA-12801/ORA-12853: insufficient memory for PX buffers: current 274880K, max needed 19722240K/ORA-04031解决方法
    关于oracle result_cache
    oracle insert、append、parallel、随后查询的redo与磁盘读写
    关于ashrpt中行源的CPU + Wait for CPU事件深入解读
    resmgr:cpu quantum 等待事件 top 1
    ORA-00600: internal error code, arguments: [kcblin_3], [103], [253952], [8192], [32769], [312], [640], [], [], [], [], []解决方法
    Oracle之with as和update用法
    oracle查询buffer cache中undo大小
    oracle group by placement可能导致错误结果的bug
    maven maven-war-plugin 解决java war项目间的依赖(两个war都可独立部署运行,maven 3.2.x亲测)
  • 原文地址:https://www.cnblogs.com/brucemengbm/p/6855542.html
Copyright © 2020-2023  润新知