- Android Internal Storage
- Internal storage are private to your application and other applications cannot access them (nor can the user). When the user uninstalls your application, these files are removed.
- Android External Storage
- External storage such as SD card can also store application data, there’s no security enforced upon files you save to the external storage. All applications can read and write files placed on the external storage and the user can remove them.
In this example we are going to save data from an EditText to both Internal Storage and External Storage, and then try to get the data back from the respective storage places.
Source for the Screen Layout – main.xml
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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> <EditText android:id="@+id/myInputText" android:layout_width="match_parent" android:layout_height="wrap_content" android:ems="10" android:lines="5" android:minLines="3" android:gravity="top|left" android:inputType="textMultiLine"> <requestFocus /> </EditText> <Button android:id="@+id/saveInternalStorage" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Save to Internal Storage" /> <Button android:id="@+id/getInternalStorage" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Display from Internal Storage" /> <Button android:id="@+id/saveExternalStorage" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Save to External Storage" /> <Button android:id="@+id/getExternalStorage" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Display from External Storage" /> <TextView android:id="@+id/responseText" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5dp" android:text="" android:textAppearance="?android:attr/textAppearanceMedium" /> </LinearLayout> |
Source for the Activity – AndroidStorageActivity.java
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