Android file operations-read the content in assets and raw files, androidassets

Android file operations-read the content in assets and raw files, androidassets

1. Create the assets folder and res/raw folder respectively. (Note that the raw file is new under res and a folder named raw is created)

2. Create two txt files and copy them to the asset and raw folders:

3. Implementation results:

4. Implementation Code:

(1) Layout file:

 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     <Button15         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>

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(2) specific implementation:

1 package base. readassetsfile; 2 3 import android. support. v7.app. appCompatActivity; 4 import android. OS. bundle; 5 import android. util. log; 6 import android. view. view; 7 import android. widget. editText; 8 9 import java. io. bufferedReader; 10 import java. io. IOException; 11 import java. io. inputStream; 12 import java. io. inputStreamReader; 13 import java. io. outputStream; 14 import java. io. unsupportedEncodingEx Ception; 15 16 public class MainActivity extends AppCompatActivity implements View. onClickListener {17 @ Override18 protected void onCreate (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 @ Override25 public void onClick (View v) {26 switch (v. getId () {27 case R. id. readFile: 28 readAsset (); 29 break; 30 case R. id. readRawFile: 31 readRaw (); 32 break; 33} 34} 35 public void readAsset () {36 try {37 // get the byte 38 InputStream inputStream = getResources () in the file (). getAssets (). open ("Test.txt"); 39 // convert byte to character 40 InputStreamReader isReader = new InputStreamReader (inputStream, "UTF-8 "); 41 // use bufferReader to read content 42 BufferedReader reader = new BufferedRe Ader (isReader); 43 String out = ""; 44 while (out = reader. readLine ())! = Null) {45 Log. d ("Read File Information:", out); 46} 47} catch (IOException e) {48 e. printStackTrace (); 49} 50} 51 public void readRaw () {52 try {53 // get the content in the file 54 InputStream inputStream = getResources (). openRawResource (R. raw. test); 55 // convert the bytes in the file into characters 56 InputStreamReader isReader = new InputStreamReader (inputStream, "UTF-8 "); 57 // use bufferReader to read character 58 BufferedReader reader = new BufferedReader (isReader); 59 String out = ""; 60 t Ry {61 while (out = reader. readLine ())! = Null) {62 Log. d ("data read from raw Folder:", out); 63} 64} catch (IOException e) {65 e. printStackTrace (); 66} 67} catch (UnsupportedEncodingException e) {68 e. printStackTrace (); 69} 70} 71 72}

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