In this tutorial how to delete the file in an Android Application is shown.<\/p>\n
To get free space or total space of memory, we can call getFreeSpace() method or getTotalSpace() method.<\/p>\n
The system does not guarantee that you can write as many bytes as are indicated by getFreeSpace() method.<\/p>\n
To delete the File we have two methods:<\/p>\n
For ex.<\/p>\n
Point to Remember:<\/p>\n
Code:<\/p>\n
activity_main.xml<\/p>\n
<RelativeLayout xmlns:android=”http:\/\/schemas.android.com\/apk\/res\/android”
\nxmlns:tools=”http:\/\/schemas.android.com\/tools”
\nandroid:layout_width=”match_parent”
\nandroid:layout_height=”match_parent”
\nandroid:paddingBottom=”@dimen\/activity_vertical_margin”
\nandroid:paddingLeft=”@dimen\/activity_horizontal_margin”
\nandroid:paddingRight=”@dimen\/activity_horizontal_margin”
\nandroid:paddingTop=”@dimen\/activity_vertical_margin”
\ntools:context=”.MainActivity” ><\/p>\n
<TextView
\nandroid:id=”@+id\/fdt2″
\nandroid:layout_width=”wrap_content”
\nandroid:layout_height=”wrap_content”
\nandroid:layout_alignParentTop=”true”
\nandroid:layout_centerHorizontal=”true”
\nandroid:layout_marginTop=”69dp”
\nandroid:text=”File I\/O Operations” \/><\/p>\n
<Button
\nandroid:id=”@+id\/delete1″
\nandroid:layout_width=”wrap_content”
\nandroid:layout_height=”wrap_content”
\nandroid:layout_alignRight=”@+id\/create1″
\nandroid:layout_below=”@+id\/view1″
\nandroid:layout_marginTop=”30dp”
\nandroid:onClick=”onFileDelete”
\nandroid:text=”Delete File” \/><\/p>\n
<\/RelativeLayout><\/p>\n
MainActivity.java<\/p>\n
package com.example.demo;<\/p>\n
import android.os.Bundle;
\nimport android.app.Activity;
\nimport android.content.Intent;
\nimport android.view.Menu;
\nimport android.view.View;<\/p>\n
public class MainActivity extends Activity{<\/p>\n
@Override
\nprotected void onCreate(Bundle savedInstanceState) {
\nsuper.onCreate(savedInstanceState);
\nsetContentView(R.layout.activity_main);
\n}<\/p>\n
public void onFileDelete(View v)
\n{
\nIntent in=new Intent(MainActivity.this,delete.class);
\nstartActivity(in);
\n}<\/p>\n
@Override
\npublic boolean onCreateOptionsMenu(Menu menu) {
\n\/\/Inflate the menu; this adds items to the action bar if it is present.
\ngetMenuInflater().inflate(R.menu.main, menu);
\nreturn true;
\n}
\n}<\/p>\n
res\/layout\/delete_layout.xml<\/p>\n
<?xml version=”1.0″ encoding=”utf-8″?>
\n<RelativeLayout xmlns:android=”http:\/\/schemas.android.com\/apk\/res\/android”
\nandroid:layout_width=”match_parent”
\nandroid:layout_height=”match_parent” ><\/p>\n
<EditText
\nandroid:id=”@+id\/fnm3″
\nandroid:layout_width=”wrap_content”
\nandroid:layout_height=”wrap_content”
\nandroid:layout_alignParentTop=”true”
\nandroid:layout_centerHorizontal=”true”
\nandroid:layout_marginTop=”72dp”
\nandroid:ems=”10″
\nandroid:hint=”Enter the File Name” ><\/p>\n
<requestFocus \/>
\n<\/EditText><\/p>\n
<Button
\nandroid:id=”@+id\/del1″
\nandroid:layout_width=”wrap_content”
\nandroid:layout_height=”wrap_content”
\nandroid:layout_alignLeft=”@+id\/fnm3″
\nandroid:layout_centerVertical=”true”
\nandroid:onClick=”deletef”
\nandroid:text=”Delete File” \/><\/p>\n
<Button
\nandroid:id=”@+id\/back3″
\nandroid:layout_width=”wrap_content”
\nandroid:layout_height=”wrap_content”
\nandroid:layout_alignBottom=”@+id\/del1″
\nandroid:layout_alignRight=”@+id\/fnm3″
\nandroid:onClick=”back”
\nandroid:text=”Back” \/><\/p>\n
<\/RelativeLayout><\/p>\n
src\/com.package.demo\/delete.java<\/p>\n
package com.example.demo;<\/p>\n
import java.io.File;<\/p>\n
import android.app.Activity;
\nimport android.content.Intent;
\nimport android.os.Bundle;
\nimport android.view.View;
\nimport android.widget.EditText;
\nimport android.widget.Toast;<\/p>\n
public class delete extends Activity{
\nFile file;
\nEditText fnm;
\nString fname;<\/p>\n
@Override
\nprotected void onCreate(Bundle savedInstanceState) {
\nsuper.onCreate(savedInstanceState);
\nsetContentView(R.layout.delete_layout);
\nfnm=(EditText)findViewById(R.id.fnm3);
\n}<\/p>\n
public void deletef(View v) throws Exception
\n{
\nfname=fnm.getText().toString();
\ntry{
\nFile dir=getFilesDir();
\nfile=new File(dir,fname);
\nboolean deleted=file.delete();
\nif(deleted)
\n{
\nToast.makeText(getBaseContext(), “File is successfully deleted”, Toast.LENGTH_SHORT).show();
\n}
\nelse
\n{
\nToast.makeText(getBaseContext(), “File deletion is unsuccessful”, Toast.LENGTH_SHORT).show();
\n}
\n}
\ncatch(Exception e)
\n{
\ne.printStackTrace();
\n}
\n}<\/p>\n
public void back(View v)
\n{
\nIntent in=new Intent(this,MainActivity.class);
\nstartActivity(in);
\n}<\/p>\n
}<\/p>\n
AndroidManifest.xml<\/p>\n
<?xml version=”1.0″ encoding=”utf-8″?>
\n<manifest xmlns:android=”http:\/\/schemas.android.com\/apk\/res\/android”
\npackage=”com.example.demo”
\nandroid:versionCode=”1″
\nandroid:versionName=”1.0″ ><\/p>\n
<uses-sdk
\nandroid:minSdkVersion=”8″
\nandroid:targetSdkVersion=”17″ \/><\/p>\n
<application
\nandroid:allowBackup=”true”
\nandroid:icon=”@drawable\/ic_launcher”
\nandroid:label=”@string\/app_name”
\nandroid:theme=”@style\/AppTheme” >
\n<activity
\nandroid:name=”com.example.demo.MainActivity”
\nandroid:label=”@string\/app_name” >
\n<intent-filter>
\n<action android:name=”android.intent.action.MAIN” \/><\/p>\n
<category android:name=”android.intent.category.LAUNCHER” \/>
\n<\/intent-filter>
\n<\/activity>
\n<activity android:name=”.delete”><\/activity>
\n<\/application><\/p>\n
<\/manifest><\/p>\n