android之文件操作——读取assets和raw文件下的内容

1 <?xml version="1.0" encoding="utf-8"?>
2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3 xmlns:tools="http://schemas.android.com/tools"
4 android:layout_width="match_parent"
5 android:layout_height="match_parent"
6 android:orientation="vertical"
7 tools:context="base.readassetsfile.MainActivity">
8     <Button
9         android:textSize="20sp"
10 android:text="@string/aasets_txt"
11 android:id="@+id/readFile"
12 android:layout_width="match_parent"
13 android:layout_height="wrap_content" />
14     <Button
15         android:textSize="20sp"
16 android:text="@string/raw"
17 android:id="@+id/readRawFile"
18 android:layout_width="match_parent"
19 android:layout_height="wrap_content" />
20 </LinearLayout>

1 packagebase.readassetsfile;
2 
3 importandroid.support.v7.app.AppCompatActivity;
4 importandroid.os.Bundle;
5 importandroid.util.Log;
6 importandroid.view.View;
7 importandroid.widget.EditText;
8 
9 importjava.io.BufferedReader;
10 importjava.io.IOException;
11 importjava.io.InputStream;
12 importjava.io.InputStreamReader;
13 importjava.io.OutputStream;
14 importjava.io.UnsupportedEncodingException;
15 
16 public class MainActivity extends AppCompatActivity implementsView.OnClickListener {
17 @Override
18     protected voidonCreate(Bundle savedInstanceState) {
19         super.onCreate(savedInstanceState);
20 setContentView(R.layout.activity_main);
21         findViewById(R.id.readFile).setOnClickListener(this);
22         findViewById(R.id.readRawFile).setOnClickListener(this);
23 }
24 @Override
25     public voidonClick(View v) {
26         switch(v.getId()){
27             caseR.id.readFile:
28 readAsset();
29                 break;
30             caseR.id.readRawFile:
31 readRaw();
32                 break;
33 }
34 }
35     public voidreadAsset(){
36         try{
37             //获取文件中的字节
38             InputStream inputStream=getResources().getAssets().open("Test.txt");
39             //将字节转换为字符
40             InputStreamReader isReader=new InputStreamReader(inputStream,"UTF-8");
41             //使用bufferReader去读取内容
42             BufferedReader reader=newBufferedReader(isReader);
43             String out="";
44             while((out=reader.readLine())!=null){
45                 Log.d("读取到的文件信息:",out);
46 }
47         } catch(IOException e) {
48 e.printStackTrace();
49 }
50 }
51     public voidreadRaw(){
52         try{
53             //获取文件中的内容
54             InputStream inputStream=getResources().openRawResource(R.raw.test);
55             //将文件中的字节转换为字符
56             InputStreamReader isReader=new InputStreamReader(inputStream,"UTF-8");
57             //使用bufferReader去读取字符
58             BufferedReader reader=newBufferedReader(isReader);
59             String out="";
60             try{
61                 while((out=reader.readLine())!=null){
62                     Log.d("从raw文件夹中读取到的数据:",out);
63 }
64             } catch(IOException e) {
65 e.printStackTrace();
66 }
67         } catch(UnsupportedEncodingException e) {
68 e.printStackTrace();
69 }
70 }
71 
72 }