问题描述
- 我的Activity跳转失败
- 设置Intent 和manifest无误 ，但 点击后就会 《已停止》
Main.java文件
package com.news_1;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;public class Main extends Activity {
private ListView listView = null;static String str[] strs;String ttt;Map<String Object> map;List<Map<String Object>> data;// List<Map<String Object>> list;Intent i1;int x i;@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final ProgressDialog myDialog = ProgressDialog.show(Main.this正在连接""please wait..."" true true); Handler handler2 = new Handler(); new Thread() { public void run() { while (ttt == null) { try { sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } myDialog.dismiss(); } }.start(); Runnable mTasks = new Runnable() { public void run() { Intent intent = new Intent(); intent.setClass(Main.this Activity.class); startActivity(intent); } }; data = new ArrayList<Map<String Object>>(); new Thread() { @Override public void run() { // String myJsonUrl = // ""http://wolfsayapi.sinaapp.com/news/api.php?act=index&type=1&page=1&size=10""; String myJsonUrl = ""http://wolfsayapi.sinaapp.com/news/api.php?act=index&page=1&size=40""; HttpGet httpRequest = new HttpGet(myJsonUrl); String strResult = """"; try { HttpClient httpClient = new DefaultHttpClient(); HttpResponse httpResponse = httpClient.execute(httpRequest); if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { strResult = EntityUtils.toString(httpResponse .getEntity()); } } catch (ClientProtocolException e) { Log.i(""DDD""protocol error""); e.printStackTrace(); } catch (IOException e) { Log.i(""DDD""IO error""); e.printStackTrace(); } try { JSONArray jsonObjs = new JSONObject(strResult) .getJSONArray(""data""); for (int i = 0; i < jsonObjs.length(); i++) { JSONObject jsonObj = (JSONObject) jsonObjs.opt(i); ttt = jsonObj.getString(""title""); Log.i(""DDD""return: "" + ttt); map = new HashMap<String Object>(); map.put(""id"" jsonObj.getString(""id"")); map.put(""img"" jsonObj.getString(""image"")); map.put(""title"" jsonObj.getString(""title"")); map.put(""time"" jsonObj.getString(""time"")); data.add(map); } // setData(data); Message msg = new Message(); msg.what = 200; handler.sendMessage(msg); } catch (JSONException e) { e.printStackTrace(); } } }.start();}@Overridepublic 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;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item);}private Handler handler = new Handler() { public void handleMessage(android.os.Message msg) { if (msg.what == 200) { setData(); } };};public void setData() { listView = (ListView) findViewById(R.id.list); listView.setAdapter(new Myadapter(this data)); listView.setOnItemClickListener(bln);}// public List<Map<String Object>> getData() {// data = new ArrayList<Map<String Object>>();// for (i = 1; i <= 16; i++) {// map = new HashMap<String Object>();// map.put(""img"" R.drawable.wolfsay);// map.put(""title"" ttt);// map.put(""time""time"");// data.add(map);// }// return data;// }private ListView.OnItemClickListener bln = new ListView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0 View arg1 int arg2 long arg3) { // Log.i(""data->"""+data.get(arg2).get(""title"")); x = (Integer) map.get(arg1); i1 = new Intent(Main.this NewsPage.class); Bundle bundle = new Bundle(); bundle.putString(""title"" (String) data.get(arg2).get(""title"")); bundle.putInt(""id"" x); i1.putExtras(bundle); startActivity(i1); return; }};}
NewsPage.java文件
package com.news_1;
import java.io.IOException;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.widget.TextView;public class NewsPage extends Activity
{
TextView t1t2;
String url=""http://wolfsayapi.sinaapp.com/news/api.php?act=content&id="";
String resulttext;
HttpResponse httpResponse2=null;
Bundle bundle = this.getIntent().getExtras();
String title = bundle.getString(""title"");
int id=bundle.getInt(""id"");
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.newspage);
new Thread() {
public void run()
{
HttpGet httpRequest2 = new HttpGet(url+id);
String strResult2 = """";
try {
HttpClient httpClient2 = new DefaultHttpClient();
HttpResponse httpResponse2 = httpClient2.execute(httpRequest2);
if (httpResponse2.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
strResult2 = EntityUtils.toString(httpResponse2
.getEntity());
}
} catch (ClientProtocolException e) {
Log.i(""AAA""protocol error"");
e.printStackTrace();
} catch (IOException e) {
Log.i(""AAA""IO error"");
e.printStackTrace();
}
try {
text=new JSONObject(strResult2).getString(""content"");
Log.i(""AAA""return: "" + text);
// setData(data);
Message msg2 = new Message();
msg2.what=200;
handler3.sendMessage(msg2);
} catch (JSONException e) {
e.printStackTrace();
}
}
}.start();
}
@SuppressLint(""HandlerLeak"")
private Handler handler3 =new Handler(){
public void handleMessage(android.os.Message msg2)
{
if(msg2.what==200)
{
setLayout();
}};};public void setLayout(){ t1=(TextView)this.findViewById(R.id.title); t1.setText(title); t2=(TextView)this.findViewById(R.id.content); t2.setText(text);}}
Manifest.xml文件
<?xml version=""1.0"" encoding=""utf-8""?>
package=""com.news_1""
android:versionCode=""1""
android:versionName=""1.0"" ><uses-sdk android:minSdkVersion=""8"" android:targetSdkVersion=""17"" /><application android:allowBackup=""true"" android:icon=""@drawable/ic_launcher"" android:label=""@string/app_name"" android:theme=""@android:style/Theme.NoTitleBar"" > <activity android:name=""com.news_1.Main"" android:label=""@string/app_name"" > <intent-filter> <action android:name=""android.intent.action.MAIN"" /> <category android:name=""android.intent.category.LAUNCHER"" /> </intent-filter> </activity> <activity android:name=""com.news_1.NewsPage"" android:label=""@string/app_name"" > </activity></application><uses-permission android:name=""android.permission.INTERNET"" />我不知道是什么错误，只要点击 进行跳转 就会 停止，Intent Manifest文件 网络权限都没问题 这个问题折磨了我很久
望大师指教
解决方案
解决方案二：
你把错误报告贴出来看看，看代码头晕