Android page Jump Transmission Parameters and page return receiving Parameters

Helloworldactivity. Java

package syit.david;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class HelloWorldActivity extends Activity{private Button btn;public final static int REQUEST_CODE = 1;/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);btn = (Button) findViewById(R.id.btn1);btn.setOnClickListener(listener);}private OnClickListener listener = new OnClickListener(){public void onClick(View v){Intent intent = new Intent();intent.setClass(HelloWorldActivity.this, SecondActivity.class);intent.putExtra("str", "First Android Application!");//startActivity(intent);startActivityForResult(intent, REQUEST_CODE);}};@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data){if(requestCode==REQUEST_CODE){if(resultCode==SecondActivity.RESULT_CODE){Bundle bundle = data.getExtras();String str = bundle.getString("back");Toast.makeText(HelloWorldActivity.this, str, Toast.LENGTH_LONG).show();}}}}

Secondactivity. Java

package syit.david;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class SecondActivity extends Activity{private TextView tv;private Button btn;public final static int RESULT_CODE = 1;@Overrideprotected void onCreate(Bundle savedInstanceState){// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.second);tv = (TextView)findViewById(R.id.secondText);Intent intent = getIntent();Bundle bundle = intent.getExtras();String s = bundle.getString("str");tv.setText(s);btn = (Button)findViewById(R.id.btn2);btn.setOnClickListener(listener);}public OnClickListener listener = new OnClickListener(){public void onClick(View v){Intent intent = new Intent();intent.putExtra("back", "Back Data");setResult(RESULT_CODE, intent);finish();}};}

The two XML files main and second in the layout directory

Main. xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <TextView        android:id="@+id/firstText"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/hello" /><Button     android:id="@+id/btn1"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="@string/btnText1"    /></LinearLayout>

Second. xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <TextView        android:id="@+id/secondText"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/hello" /><Button     android:id="@+id/btn2"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="@string/btnText2"    /></LinearLayout>

Androidmanifest. xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="syit.david"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk android:minSdkVersion="15" />    <application        android:icon="@drawable/ic_launcher"        android:label="@string/app_name" >        <activity            android:name=".HelloWorldActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity android:name=".SecondActivity"           android:label="@string/app_name">        </activity>    </application><uses-permission android:name="android.permission.CALL_PHONE"/><uses-permission android:name="android.permission.SEND_SMS"/></manifest>

Note:

1. After creating an android activity, you must register the declaration in the androidmanifest. xml file.

2. Use the startactivityforresult () method to PASS Parameters on the page, and write the parameters
Onactivityresult () method, which is used for processing.

3. Use the setresult () method on the receiving page to return the value.