如何把一个listview中选中的值展示到另外一个 activity中

来源：互联网发布：mysql null不允许连接编辑：程序博客网时间：2024/06/14 23:45

我正在创建一个简单的app,有一个功能是从第一个listView中取到选中的值展示到第二个activity中，中间是用了Intent传递，但是现在有个问题时我不知道如何才能在第二个activity中。

MainActivity.java

package com.devleb.listviewdemo; import android.app.ListActivity;import android.content.Intent;import android.os.Bundle;import android.view.Menu;import android.view.View;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.TextView; public class MainActivity extends ListActivity {    TextView txt;    private static final String[] items = { "doctor", "engineer", "lawer",            "developer", "employee", "business man", "auditer", "cashier" };       @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        setListAdapter(new ArrayAdapter<String>(this,                android.R.layout.simple_list_item_1, items));        txt = (TextView) findViewById(R.id.txt);     }     @Override    protected void onListItemClick(ListView l, View v, int position, long id) {        // TODO Auto-generated method stub        super.onListItemClick(l, v, position, id);         // txt.setText(items[position]);         Intent i = new Intent(this, SecondActivity.class);        i.putExtra("testonArray", items);        startActivity(i);    }     @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    } }SecondActivity.javapackage com.devleb.listviewdemo; import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.widget.EditText;import android.widget.TextView; public class SecondActivity extends Activity {     TextView txt;     @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_second);         Bundle extras=getIntent().getExtras();        String [] values = extras.getStringArray ("testonArray");        txt = (TextView) findViewById (R.id.txt2);        if (values != null && values.length > 0 && txt != null){           txt.setText(values [0]);        }         }     @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.second, menu);        return true;    } }

处理方法

First Activity的代码:

+@Override    protected void onListItemClick(ListView l, View v, int position, long id) {        // TODO Auto-generated method stub        super.onListItemClick(l, v, position, id);         // txt.setText(items[position]);         // Try to send the items[position] in the intent        Intent i = new Intent(this, SecondActivity.class);        i.putExtra("testonArray", items[position].toString());        startActivity(i);    }

第二个activity代码

Bundle extras=getIntent().getExtras();   String selected_item=extras.getString("testonArray");   txt = (TextView) findViewById (R.id.txt2);   txt.setText(selected_item);

原文地址：http://www.itmmd.com/201411/215.html
该文章由萌萌的IT人整理发布,转载须标明出处。

0 0