打招呼--android應用程序（打開新的Activity，並傳值）

佈局activity_main.xml

<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:background="@drawable/bg">

    <TextView
        android:id="@+id/nameinput"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="87dp"
        android:padding="@dimen/padding_medium"
        android:text="@string/nameinput"
        tools:context=".MainActivity" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/nameinput"
        android:layout_centerHorizontal="true"
        android:inputType="text"
        android:ems="10" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/editText1"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="16dp"
        android:text="@string/click" />

</RelativeLayout>

新的Activity的佈局activity_show.xml

<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" >

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:padding="@dimen/padding_medium"
        android:text="@string/hello_world"
        tools:context=".ShowActivity" />

</RelativeLayout>

string.xml

<resources>

    <string name="app_name">打招呼</string>
    <string name="nameinput">請輸入你的姓名：</string>
    <string name="click">點擊我</string>
    <string name="menu_settings">Settings</string>
    <string name="title_activity_main">打招呼</string>
    <string name="hello_world">你好!</string>
    <string name="title_activity_show">ShowActivity</string>

</resources>

 

MainActivity.java

package com.lll.sayhello.activity;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.support.v4.app.NavUtils;

public class MainActivity extends Activity {
    //定義組件
	private EditText nameInput;
	private Button click;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //查找組件
        nameInput=(EditText) this.findViewById(R.id.editText1);
        click=(Button) this.findViewById(R.id.button1);
        //方式一
        //click.setOnClickListener(new ClickHandle());
        /*
         * 方式二
         */
        click.setOnClickListener(new OnClickListener(){
        	public void onClick(View v) {
    			String name=nameInput.getText().toString();
    			//Toast.makeText(MainActivity.this, "你好"+name, Toast.LENGTH_LONG).show();
   			    //跳轉到另一個Activity
    			Intent intent=new Intent();
    			intent.setClass(MainActivity.this, ShowActivity.class);
    			//向新的Activity傳遞參數
    			Bundle bundle=new Bundle();
    			bundle.putString("name", name);
    			intent.putExtras(bundle);
    			startActivity(intent);
    		}
        });
    }
    //方式一
//    private class ClickHandle implements OnClickListener{
//		public void onClick(View v) {
//			String name=nameInput.getText().toString();
//			Toast.makeText(MainActivity.this, "你好"+name, Toast.LENGTH_LONG).show();
//			
//		}
//    	
//    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    
}

 

ShowActivity.java

package com.lll.sayhello.activity;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.support.v4.app.NavUtils;

public class ShowActivity extends Activity {
    private TextView nameView;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_show);
        nameView=(TextView) this.findViewById(R.id.text);
        Intent intent=this.getIntent();
        Bundle bundle=intent.getExtras();
        String name=bundle.getString("name");
        nameView.setText("你好:"+name);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_show, menu);
        return true;
    }

    
}

 

AndroidMainfest.xml

<activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ShowActivity"
            android:label="@string/title_activity_show" >
        </activity>