私はあなたの要件のための解決策を見つけました。だから、これを試してみてください。しかし、そのためには、Image-viewの代わりにDrawing-Viewを使ってGalleryから取り出されたImageにテキストを描画したり書き込んだりする必要があります。
ここに、私はコードを掲示しています。
activity_main.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
android:paddingBottom="5dp"
android:paddingTop="5dp"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:id="@+id/buttonNew"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/start_new"
android:src="@drawable/new_pic" />
<ImageButton
android:id="@+id/buttonBrush"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/brush"
android:src="@drawable/brush" />
<ImageButton
android:id="@+id/buttonErase"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/erase"
android:src="@drawable/eraser" />
<ImageButton
android:id="@+id/buttonSave"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/save"
android:src="@drawable/save" />
<ImageButton
android:id="@+id/buttonPickImage"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/save"
android:src="@drawable/save" />
</LinearLayout>
<com.wordpress.priyankvex.paintapp.DrawingView
android:id="@+id/drawing"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="3dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="3dp"
android:layout_weight="1"
android:background="@color/white" />
<!-- Color pallet -->
<LinearLayout
android:id="@+id/paint_colors"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="@color/skin"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/pallet"
android:tag="@color/skin" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="@color/black"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/pallet"
android:tag="@color/black" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="@color/red"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/pallet"
android:tag="@color/red" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="@color/green"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/pallet"
android:tag="@color/green" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="@color/blue"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/pallet"
android:tag="@color/blue" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="@color/yellow"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/pallet"
android:tag="@color/yellow" />
</LinearLayout>
</LinearLayout>
MainActivity.java：
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;
import java.util.UUID;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private DrawingView mDrawingView;
private ImageButton currPaint, drawButton, eraseButton, newButton, saveButton, buttonPickImage;
private float smallBrush, mediumBrush, largeBrush;
private final int RESULT_LOAD_IMAGE = 20;
private Uri pickedImage;
private String imagePath = "";
public Bitmap PaintBitmap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDrawingView = (DrawingView) findViewById(R.id.drawing);
// Getting the initial paint color.
LinearLayout paintLayout = (LinearLayout) findViewById(R.id.paint_colors);
// 0th child is white color, so selecting first child to give black as initial color.
currPaint = (ImageButton) paintLayout.getChildAt(1);
currPaint.setImageDrawable(getResources().getDrawable(R.drawable.pallet_pressed));
drawButton = (ImageButton) findViewById(R.id.buttonBrush);
drawButton.setOnClickListener(this);
eraseButton = (ImageButton) findViewById(R.id.buttonErase);
eraseButton.setOnClickListener(this);
newButton = (ImageButton) findViewById(R.id.buttonNew);
newButton.setOnClickListener(this);
saveButton = (ImageButton) findViewById(R.id.buttonSave);
saveButton.setOnClickListener(this);
buttonPickImage = (ImageButton) findViewById(R.id.buttonPickImage);
buttonPickImage.setOnClickListener(this);
smallBrush = getResources().getInteger(R.integer.small_size);
mediumBrush = getResources().getInteger(R.integer.medium_size);
largeBrush = getResources().getInteger(R.integer.large_size);
// Set the initial brush size
mDrawingView.setBrushSize(mediumBrush);
}
/**
* Method is called when color is clicked from pallet.
*
* @param view ImageButton on which click took place.
*/
public void paintClicked(View view) {
if (view != currPaint) {
// Update the color
ImageButton imageButton = (ImageButton) view;
String colorTag = imageButton.getTag().toString();
mDrawingView.setColor(colorTag);
// Swap the backgrounds for last active and currently active image button.
imageButton.setImageDrawable(getResources().getDrawable(R.drawable.pallet_pressed));
currPaint.setImageDrawable(getResources().getDrawable(R.drawable.pallet));
currPaint = (ImageButton) view;
mDrawingView.setErase(false);
mDrawingView.setBrushSize(mDrawingView.getLastBrushSize());
}
}
@Override
public void onClick(View v) {
int id = v.getId();
switch (id) {
case R.id.buttonBrush:
// Show brush size chooser dialog
showBrushSizeChooserDialog();
break;
case R.id.buttonErase:
// Show eraser size chooser dialog
showEraserSizeChooserDialog();
break;
case R.id.buttonNew:
// Show new painting alert dialog
showNewPaintingAlertDialog();
break;
case R.id.buttonSave:
// Show save painting confirmation dialog.
showSavePaintingConfirmationDialog();
break;
case R.id.buttonPickImage:
// Show save painting confirmation dialog.
Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
break;
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK) {
pickedImage = data.getData();
String[] filePath = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(pickedImage, filePath, null, null, null);
cursor.moveToFirst();
imagePath = cursor.getString(cursor.getColumnIndex(filePath[0]));
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
// set Gallery Image to Drawing-view
if (imagePath != null) {
PaintBitmap = getResizeBitmap(imagePath);
BitmapDrawable ob = new BitmapDrawable(getResources(), PaintBitmap);
mDrawingView.setBackgroundDrawable(ob);
}
}
}
}
public static Bitmap getResizeBitmap(String path) {
BitmapFactory.Options op = new BitmapFactory.Options();
op.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap bmap = BitmapFactory.decodeFile(path, op);
int nh = (int) (bmap.getHeight() * (1024.0/bmap.getWidth()));
Bitmap bitmapThumbnail = Bitmap.createScaledBitmap(bmap, 1024, nh, true);
int bitmapWidthMain = bitmapThumbnail.getWidth();
int bitmapHeightMain = bitmapThumbnail.getHeight();
return bitmapThumbnail;
}
private void showBrushSizeChooserDialog() {
final Dialog brushDialog = new Dialog(this);
brushDialog.setContentView(R.layout.dialog_brush_size);
brushDialog.setTitle("Brush size:");
ImageButton smallBtn = (ImageButton) brushDialog.findViewById(R.id.small_brush);
smallBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mDrawingView.setBrushSize(smallBrush);
mDrawingView.setLastBrushSize(smallBrush);
brushDialog.dismiss();
}
});
ImageButton mediumBtn = (ImageButton) brushDialog.findViewById(R.id.medium_brush);
mediumBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mDrawingView.setBrushSize(mediumBrush);
mDrawingView.setLastBrushSize(mediumBrush);
brushDialog.dismiss();
}
});
ImageButton largeBtn = (ImageButton) brushDialog.findViewById(R.id.large_brush);
largeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mDrawingView.setBrushSize(largeBrush);
mDrawingView.setLastBrushSize(largeBrush);
brushDialog.dismiss();
}
});
mDrawingView.setErase(false);
brushDialog.show();
}
private void showEraserSizeChooserDialog() {
final Dialog brushDialog = new Dialog(this);
brushDialog.setTitle("Eraser size:");
brushDialog.setContentView(R.layout.dialog_brush_size);
ImageButton smallBtn = (ImageButton) brushDialog.findViewById(R.id.small_brush);
smallBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mDrawingView.setErase(true);
mDrawingView.setBrushSize(smallBrush);
brushDialog.dismiss();
}
});
ImageButton mediumBtn = (ImageButton) brushDialog.findViewById(R.id.medium_brush);
mediumBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mDrawingView.setErase(true);
mDrawingView.setBrushSize(mediumBrush);
brushDialog.dismiss();
}
});
ImageButton largeBtn = (ImageButton) brushDialog.findViewById(R.id.large_brush);
largeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mDrawingView.setErase(true);
mDrawingView.setBrushSize(largeBrush);
brushDialog.dismiss();
}
});
brushDialog.show();
}
private void showNewPaintingAlertDialog() {
AlertDialog.Builder newDialog = new AlertDialog.Builder(this);
newDialog.setTitle("New drawing");
newDialog.setMessage("Start new drawing (you will lose the current drawing)?");
newDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
mDrawingView.startNew();
dialog.dismiss();
}
});
newDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
newDialog.show();
}
private void showSavePaintingConfirmationDialog() {
AlertDialog.Builder saveDialog = new AlertDialog.Builder(this);
saveDialog.setTitle("Save drawing");
saveDialog.setMessage("Save drawing to device Gallery?");
saveDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
//save drawing
mDrawingView.setDrawingCacheEnabled(true);
String imgSaved = MediaStore.Images.Media.insertImage(
getContentResolver(), mDrawingView.getDrawingCache(),
UUID.randomUUID().toString() + ".png", "drawing");
if (imgSaved != null) {
Toast savedToast = Toast.makeText(getApplicationContext(),
"Drawing saved to Gallery!", Toast.LENGTH_SHORT);
savedToast.show();
} else {
Toast unsavedToast = Toast.makeText(getApplicationContext(),
"Oops! Image could not be saved.", Toast.LENGTH_SHORT);
unsavedToast.show();
}
// Destroy the current cache.
mDrawingView.destroyDrawingCache();
}
});
saveDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
saveDialog.show();
}
}
たManifest.xml：
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
これを試してみてくださいコードには、異なるブラシサイズの画像に描画テキスト用のブラシ、テキスト上にさまざまな色のテキストを描画するためのイレーサー、カラーピッカーが含まれています。ギャラリーにテキストで画像を保存します。
これによって、私はスクリーンショット、
希望を取り付け、それはあなたを助けるしています。 :)