默认地址显示-activity

默认地址显示

两个Activity，主Activity一打开就显示默认的地址，如果是第一次打开，则提示用户没有默认地址。 点击按钮可以打开修改默认地址的Activity。

组件：一个显示框，一个按钮 

副Activity

组件：输入框  确认按钮  撤销按钮

输入默认地址，点击确认，就会传回到主Activity显示并且保存。

activity_main.xml文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/tv01"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="没有默认地址"
        android:textSize="20dp"/>

    <Button
        android:id="@+id/btn01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="open"/>


</LinearLayout>

MainActivity.java文件

package com.example.pprp.myapplication_lh;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
    Button btn01;
    TextView tv01;

    private static final int SUBACTIVITY1=1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btn01=(Button)findViewById(R.id.btn01);
        tv01=(TextView)findViewById(R.id.tv01);

        btn01.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public  void onClick(View view)
            {
                Intent intent=new Intent(MainActivity.this,subactivity.class);
                startActivityForResult(intent,SUBACTIVITY1);
            }
        });

    }

    public void onActivityResult(int requestCode,int resultCode,Intent data)//请求码，返回状态，返回的数据
    {
        super.onActivityResult(requestCode,resultCode,data);
        switch(requestCode){ //对请求码进行匹配
            case SUBACTIVITY1:
                if(resultCode==Activity.RESULT_OK)
                {
                    Uri uridata=data.getData();//获取uri数据
                    tv01.setText(uridata.toString());
                }
                else if(resultCode== Activity.RESULT_CANCELED)
                {

                }
                break; //不要忘记break
        }
    }
}

subactvity.xml文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <EditText
        android:id="@+id/et01"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/btnok"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="ok"/>
    <Button
        android:id="@+id/btncannel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="cannel"/>

</LinearLayout>

subactivity.java文件

package com.example.pprp.myapplication_lh;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.PersistableBundle;
import android.support.annotation.Nullable;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

/**
 * Created by lh on 2018/11/20.
 */

public class subactivity extends Activity{

    EditText et01;
    Button btnok;
    Button btncannel;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.subactivity);

        et01= (EditText)findViewById(R.id.et01);
        btnok=(Button)findViewById(R.id.btnok);
        btncannel=(Button)findViewById(R.id.btncannel);

        btnok.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String smg=et01.getText().toString();

                Uri data= Uri.parse(smg);//数据以Uri的形式返回给父Activity
                Intent intent=new Intent(null,data);
                setResult(RESULT_OK,intent);
                finish();
            }
        });

        btncannel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                finish();
            }
        });


    }
}

AndroidManifest.xml文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.pprp.myapplication_lh">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        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=".subactivity">

        </activity>
    </application>

</manifest>