android – 如何将.txt文件读入ListView？

概述我试图将存储在单独的文本文件中的行读入我的 Android应用程序,并让每行显示在列表视图中. 问题是我无法得到任何东西,尽管我的代码说它们不是错误.当您阅读此代码时,我将澄清我的ListView被命名为“addresslist”,而我正在读取的文件名为“myaddress.txt”.我感谢任何帮助. ListView listView= (ListView) findViewById(R.id. 我试图将存储在单独的文本文件中的行读入我的 Android应用程序,并让每行显示在列表视图中.

问题是我无法得到任何东西,尽管我的代码说它们不是错误.当您阅读此代码时,我将澄清我的ListVIEw被命名为“addressList”,而我正在读取的文件名为“myaddress.txt”.我感谢任何帮助.

ListVIEw ListVIEw= (ListVIEw) findVIEwByID(R.ID.addressList); try{    inputStream instream = openfileinput("myaddress.txt");    inputStreamReader inputreader = new inputStreamReader(instream);    BufferedReader buffreader = new BufferedReader(inputreader);    ArrayList<String> lines = new ArrayList<String>();    boolean hasNextline =true;    while (hasNextline){        String line =  buffreader.readline();        lines.add(line);        hasNextline = line != null;    }    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.ID.addressList,lines);    ListVIEw.setAdapter(adapter);    instream.close();    }    catch(java.io.fileNotFoundException e){    }catch(java.io.IOException e){    }}

在日志中出现以下错误：

12-08 01:21:30.394: E/Trace(1500): [ 12-08 01:21:30.864  1500: 1500 V/Home to School 4828 N. Crescent norrIDge IL 60706,5500 N St Louis Avenue Chicago IL 60625; Home to School 4828 N. Crescent norrIDge IL 60706,5500 N St Louis Avenue Chicago IL 60625; 12-08 01:21:30.864: D/AndroIDRuntime(1500): Shutting down VM12-08 01:21:30.924: W/dalvikvm(1500): threadID=1: thread exiting with uncaught exception (group=0xb3e92288)12-08 01:21:30.944: E/AndroIDRuntime(1500): FATAL EXCEPTION: main12-08 01:21:30.944: E/AndroIDRuntime(1500): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.tripapp/com.tripapp.Frontpage}: java.lang.NullPointerException: println needs a message12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.app.ActivityThread.performlaunchActivity(ActivityThread.java:2059)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.app.ActivityThread.access0(ActivityThread.java:130)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.os.Handler.dispatchMessage(Handler.java:99)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.os.Looper.loop(Looper.java:137)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.app.ActivityThread.main(ActivityThread.java:4745)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at java.lang.reflect.Method.invokeNative(Native Method)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at java.lang.reflect.Method.invoke(Method.java:511)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:553)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at dalvik.system.NativeStart.main(Native Method)12-08 01:21:30.944: E/AndroIDRuntime(1500): Caused by: java.lang.NullPointerException: println needs a message12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.util.Log.println_native(Native Method)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.util.Log.v(Log.java:117)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at com.tripapp.Frontpage.onCreate(Frontpage.java:61)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.app.Activity.performCreate(Activity.java:5008)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)12-08 01:21:30.944: E/AndroIDRuntime(1500):     at androID.app.ActivityThread.performlaunchActivity(ActivityThread.java:2023)12-08 01:21:30.944: E/AndroIDRuntime(1500):     ... 11 more

解决方法 首先将文件移动到项目的assets文件夹中,然后使用此代码从assets文件夹中读取文件：

try{    inputStream inputreader = getAssets().open("myaddress.txt");    BufferedReader buffreader = new BufferedReader(new inputStreamReader(inputreader));   // your code here

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