我是Android新手。我想在我的应用程序中创建一个目录。我只会在那里显示名字。我正在使用Directory类来显示名称和AddPerson类以在其中添加。但AddPerson不起作用。这里是我的目录:使用startActivityForResult将数据添加到列表
package com.example.user.myapplication;
import android.content.Intent;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ListView;
import java.util.ArrayList;
public class Directory extends AppCompatActivity {
ArrayList<String> personList = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
ListView list;
ImageButton addButton;
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_directory);
list = (ListView) findViewById(R.id.listView);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,android.R.id.text1, personList);
list.setAdapter(adapter);
addButton = (ImageButton)findViewById(R.id.imageButton5);
addButton.setOnClickListener(
new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent("com.example.user.myapplication.AddPerson");
startActivityForResult(intent, 1);
}
}
);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1 && resultCode == RESULT_OK){
String result=data.getStringExtra("result");
personList.add(result);
}
}
}
这是addPerson的类: 包com.example.user.myapplication;
import android.app.Activity;
import android.content.DialogInterface;
import android.content.Intent;
import android.support.v7.app.AlertDialog;
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.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
public class AddPerson extends AppCompatActivity {
Button addButton;
EditText nameText;
Directory d = new Directory();
public String name;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_person);
addButton = (Button) findViewById(R.id.button);
addButton.setOnClickListener(
new View.OnClickListener() {
public void onClick(View v) {
nameText = (EditText) findViewById(R.id.editText);
EditText mailText = (EditText) findViewById(R.id.editText2);
name = nameText.getText().toString();
Intent returnIntent = new Intent();
returnIntent.putExtra("result", name);
setResult(1, returnIntent);
finish();
}
}
);
}
}
谢谢但它仍然不起作用 – aladinsane7
你有没有试过通过并看到从第二个活动返回时会发生什么? – dharms
对不起,我不明白你的意思 – aladinsane7