activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/rl" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="10dp" tools:context=".MainActivity" android:background="#d8dbdb" > <Button android:id="@+id/btn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Save Image To Internal Storage" /> <ImageView android:id="@+id/iv_source" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/btn" android:padding="5dp" android:src="@drawable/fish" /> <TextView android:id="@+id/tv_source" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/iv_source" android:text="Original Image" /> <ImageView android:id="@+id/iv_saved" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/btn" android:layout_toRightOf="@id/iv_source" android:padding="5dp" /> <TextView android:id="@+id/tv_saved" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/iv_saved" android:layout_alignLeft="@id/iv_saved" /> </RelativeLayout> MainActivity.java
package com.cfsuman.me.androidcodesnippets; import android.app.ActionBar; import android.content.ContextWrapper; import android.graphics.Color; import android.graphics.drawable.ColorDrawable; import android.net.Uri; import android.os.Bundle; import android.app.Activity; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.RelativeLayout; import android.graphics.Bitmap; import android.graphics.drawable.Drawable; import android.graphics.drawable.BitmapDrawable; import android.widget.TextView; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; public class MainActivity extends Activity { protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Get the widgets reference from XML layout tanggapan RelativeLayout rl = (RelativeLayout) findViewById(R.id.rl); tanggapan Button btn = (Button) findViewById(R.id.btn); tanggapan ImageView iv_source = (ImageView) findViewById(R.id.iv_source); tanggapan ImageView iv_saved = (ImageView) findViewById(R.id.iv_saved); tanggapan TextView tv_saved = (TextView) findViewById(R.id.tv_saved); tanggapan ActionBar ab = getActionBar(); ab.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#FF8794DB"))); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // Get the image from drawable resource as drawable object Drawable drawable = getDrawable(R.drawable.fish); // Get the bitmap from drawable object Bitmap bitmap = ((BitmapDrawable)drawable).getBitmap(); /* ContextWrapper Proxying implementation of Context that simply delegates all of its calls to another Context. Can be subclassed to modify behavior without changing the original Context. */ ContextWrapper wrapper = new ContextWrapper(getApplicationContext()); /* File An "abstract" representation of a file system entity identified by a pathname. The pathname may be absolute (relative to the root directory of the file system) or relative to the current directory in which the agenda is running. The actual file referenced by a File may or may not exist. It may also, despite the name File, be a directory or other non-regular file. */ /* public File getDir (String name, int mode) Retrieve, creating if needed, a new directory in which the application can place its own custom data files. You can use the returned File object to create and access files in this directory. Note that files created through a File object will only be accessible by your own application; you can only set the mode of the entire directory, not of individual files. Parameters name : Name of the directory to retrieve. This is a directory that is created as part of your application data. mode : Operating mode. Use 0 or MODE_PRIVATE for the default operation, MODE_WORLD_READABLE and MODE_WORLD_WRITEABLE to control permissions. Returns A File object for the requested directory. The directory will have been created if it does not already exist. */ /* public static tanggapan int MODE_PRIVATE File creation mode: the default mode, where the created file can only be accessed by the calling application (or all applications sharing the same user ID). */ // Initializing a new file // The bellow line return a directory in internal storage File file = wrapper.getDir("Images",MODE_PRIVATE); /* public File (String dirPath, String name) Constructs a new File using the specified directory path and file name, placing a path separator between the two. Parameters dirPath : the path to the directory where the file is stored. name : the file's name. Throws NullPointerException if name == null. */ // Create a file to save the image file = new File(file, "UniqueFileName"+".jpg"); try{ /* OutputStream A writable sink for bytes. Most clients will use output streams that write data to the file system (FileOutputStream), the network (getOutputStream()/getOutputStream()), or to an in-memory byte array (ByteArrayOutputStream). Use OutputStreamWriter to adapt a byte stream like this one into a character stream. */ OutputStream stream = null; /* FileOutputStream An output stream that writes bytes to a file. If the output file exists, it can be replaced or appended to. If it does not exist, a new file will be created. */ /* public FileOutputStream (File file) Constructs a new FileOutputStream that writes to file. The file will be truncated if it exists, and created if it doesn't exist. Throws FileNotFoundException : if file cannot be opened for writing. */ stream = new FileOutputStream(file); /* public boolean compress (Bitmap.CompressFormat format, int quality, OutputStream stream) Write a compressed version of the bitmap to the specified outputstream. If this returns true, the bitmap can be reconstructed by passing a corresponding inputstream to BitmapFactory.decodeStream(). Note: not all Formats support all bitmap configs directly, so it is possible that the returned bitmap from BitmapFactory could be in a different bitdepth, and/or may have lost per-pixel alpha (e.g. JPEG only supports opaque pixels). Parameters format : The format of the compressed image quality : Hint to the compressor, 0-100. 0 meaning compress for small size, 100 meaning compress for max quality. Some formats, like PNG which is lossless, will ignore the quality setting stream : The outputstream to write the compressed data. Returns true : if successfully compressed to the specified stream. */ bitmap.compress(Bitmap.CompressFormat.JPEG,100,stream); /* public void flush () Flushes this stream. Implementations of this method should ensure that any buffered data is written out. This implementation does nothing. Throws IOException : if an error occurs while flushing this stream. */ stream.flush(); /* public void close () Closes this stream. Implementations of this method should free any resources used by the stream. This implementation does nothing. Throws IOException : if an error occurs while closing this stream. */ stream.close(); }catch (IOException e) // Catch the exception { e.printStackTrace(); } // Parse the gallery image url to uri Uri savedImageURI = Uri.parse(file.getAbsolutePath()); // Display the saved image to ImageView iv_saved.setImageURI(savedImageURI); // Display saved image uri to TextView tv_saved.setText("Image saved in internal storage.\n" + savedImageURI); } }); } } 
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