Activity页面之间数据传递

页面自检的数据传递

图一：

实现效果如下

图二：

代码实现

图一布局文件

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<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.example.g160628_android_12_activity.Main3Activity">    <EditText        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:id="@+id/et_main3_EditText"        android:hint="输入要发送的文字"/>    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:id="@+id/but_main3_Button"        android:text="发送"        android:onClick="JumpMain4"        /></LinearLayout>

图一activity

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package com.example.g160628_android_12_activity;import android.content.Intent;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;public class Main3Activity extends AppCompatActivity {    private EditText editText;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main3);        //文本框        editText = (EditText) findViewById(R.id.et_main3_EditText);        //按钮        Button button= (Button) findViewById(R.id.but_main3_Button);    }    //点击事件跳界面    public void JumpMain4(View view){        //得到EditText的值        String text=editText.getText().toString();        Intent intent=new Intent(this,Main4Activity.class);        intent.putExtra("text",text);        startActivity(intent);    }}

图二布局文件

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<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.example.g160628_android_12_activity.Main4Activity">   <EditText       android:layout_width="match_parent"       android:layout_height="wrap_content"       android:id="@+id/et_main4_EditText"       android:textSize="25dp"/>    <TextView        android:gravity="center"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="上面接收后的值"        android:textSize="25dp"/></LinearLayout>

图二activity

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package com.example.g160628_android_12_activity;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.EditText;public class Main4Activity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main4);        EditText Main4editText= (EditText) findViewById(R.id.et_main4_EditText);        //获取值        String text=getIntent().getStringExtra("text");        Main4editText.setText(text);    }}