20170130
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.wata.myapplication">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SecondActivity"></activity>
</application>
</manifest>
//
package com.example.wata.myapplication;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = new Intent(this, SecondActivity.class);
startActivityForResult(intent, 123);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent){
switch(requestCode){
case(123):
if(resultCode == RESULT_OK){
Bundle extras = intent.getExtras();
String string = extras.getString("value");
Toast.makeText(this, string, Toast.LENGTH_LONG).show();
}else if(resultCode == RESULT_CANCELED){
}else{
}
break;
default:
break;
}
}
}
//
package com.example.wata.myapplication;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
public class SecondActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second2);
Intent data = new Intent();
data.putExtra("value", "From SecondActivity");
setResult(RESULT_OK, data);
finish();
}
}