安卓作业4.6

界面1：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main1"
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="com.example.duoapplication.Main1Activity"
android:orientation="vertical"

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"

>





界面2：

java代码1：

package com.example.duoapplication;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class Main1Activity extends AppCompatActivity {
private EditText xm;
private TextView tv;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main1);
xm = (EditText) findViewById(R.id.et);
tv = (TextView) findViewById(R.id.tv);

}

public void onClick(View view){
String name = xm.getText().toString();
switch (view.getId()){
case R.id.pg:
Intent intent =new Intent(Main1Activity.this,Main2Activity.class);
intent.putExtra("name",name);
startActivityForResult(intent,1000);
break;
case R.id.tc:
finish();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode1000&&resultCode1001){
String name = xm.getText().toString();
String qqq=data.getStringExtra("result");
tv.setText(name+"同学"+qqq+"信心");
}
}
}

java代码2

package com.example.duoapplication;

import android.content.Intent;
import android.support.v4.content.res.TypedArrayUtils;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class Main2Activity extends AppCompatActivity {
private TextView t;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
t= (TextView)findViewById(R.id.t);
Intent xintent =getIntent();
String name = xintent.getStringExtra("name");
t.setText(name+":"+"学习有没有信心？");
}
public void xxx(View view){
switch (view.getId()){
case R.id.y:
case R.id.my:
Button but = (Button)view;
Intent mintent=new Intent();
String xxx= but.getText().toString();
mintent.putExtra("result",xxx);
setResult(1001,mintent);
finish();

}
}
}

value值

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