package com.example.popword;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import java.io.File;
import java.util.Scanner;
public class ReadText1 extends Activity {
TextView textview;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textview = (TextView) findViewById(R.id.textView);
try (Scanner scanner = new Scanner(new File("C:\\Users\\UOU\\Desktop\\word.txt"))) {
while (scanner.hasNext()) {
textview.setText(scanner.nextLine());
}
} catch (Exception e) {
System.err.println("Exception occurred!");
}
}
}
=================================================================================== 2019-11-13 20:07:44.224 1004-1004/TransactionExecutor.java:68E/cklee：android.app.ActivityThread（H.handleMessage）ActivityThread.java:1808（android.os.Handler.dispatchMessage）Handler.java:106（android.os.Looper.loop）Looper.java:193（android.app.ActivityThread.main）ActivityThread.java:6669（java.lang.reflect.Method.invoke）com.android.internal.os.RuntimeInit（MethodAndArgsCaller.run）android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:3048）android.app.servertransaction.LaunchActivityItem.execute（LaunchActivityItem.java:78）android.app.servertransaction.TransactionExecutor.executeCallbacks（TransactionExecutor.java:108）android.app.servertransaction.TransactionExecutor.execute（com.example.popword）com.example.popword.ReadText1.printStackTraceReadText1.java:29（com.example.popword.ReadText1.onCreate）ReadText1.java:22（android.app.Activity.performCreate）Activity.java:7136（android.app.Activity.performCreate）Activity.java:7127（android.app.Instrumentation.callActivityOnCreate）Instrumentation.java:1271（原生方法）android.app.ActivityThread.performLaunchActivity$ActivityThread.java:2893
你需要把你的txt文件放在Android项目包里。你可以把它放在:
AssetManager am = context.getAssets();
InputStream is = am.open("word.txt");
InputStream是=getResources（）.openRawResource（R.raw.word）；
你怎么能读取你电脑上的文件呢？网上有很多教程向你解释如何在android中读写文件。我会用BufferedReader代替Scanner。
您可以直接从存储或SD卡中读取文件，请按照以下步骤操作：
1.将这两个权限添加到项目清单文件中
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
2.创建以下函数
private void ReadTxtFile(File txtfilepath) {
if (txtfilepath.exists()) {
StringBuffer txt = new StringBuffer();
try {
BufferedReader br = new BufferedReader(new FileReader(txtfilepath));
String line;
while ((line = br.readLine()) != null) {
txt.append(line);
txt.append('\n');
}
br.close();
} catch (IOException e) {
Log.e("Exception:",e.toString());
}
Log.e("File Text:",txt.toString());// "txt" variable contian your file text
}
}
随时随地调用函数，并提供文本文件路径作为函数参数
ReadTxtFile(new File("/sdcard/Download/sample.txt"));
