我需要在发生触摸事件的图像的X,Y坐标上应用一些文本。就像Facebook上的图像标记一样。因此,每次触摸发生时,用户都可以在触摸点的txtview中放置一些文本。
到目前为止,我所做的是我正在从图库加载图像并在图像查看器上显示它。
public class LoadImg extends Activity {
private static int RESULT_LOAD_IMAGE = 1;
int x,y;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
x=0;y=0;
String picturePath = PreferenceManager.getDefaultSharedPreferences(this).getString("picturePath", "");
if(!picturePath.equals(""))
{
ImageView imageView = (ImageView) findViewById(R.id.imageView1);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
Button buttonLoadImage = (Button) findViewById(R.id.button1);
buttonLoadImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
PreferenceManager.getDefaultSharedPreferences(this).edit().putString("picturePath", picturePath).commit();
cursor.close();
ImageView imageView = (ImageView) findViewById(R.id.imageView1);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
} }
同时实现OnTouchListener,我正在尝试此代码但无法正常工作。任何帮助。
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
x=(int) event.getX();
y=(int) event.getY();
imageshow();
return true;
}
private void imageshow() {
// TODO Auto-generated method stub
if(x!=0 && y!=0)
{
TextView tv=new TextView(this);
LinearLayout.LayoutParams trparams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
tv.setLayoutParams(trparams);
tv.layout(x, y, 0, 0);
}
}
像this
这样的东西答案 0 :(得分:0)
我从这个问题中理解的是,你有一个图像视图,我们在哪里触摸图像,你需要一个文本。
我使用FrameLayout
完成了此操作。
首先,我将ImageView与FrameLayout包装为
<FrameLayout
android:id="@+id/frameLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/imageView1"
android:layout_marginTop="98dp" >
<ImageView
android:id="@+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="38dp"
android:src="@drawable/old1" />
</FrameLayout>
这不是必须的,要成为FrameLayout。 只需用一些布局包装图片。
然后在MainActivity中,我完成了
public class MainActivity extends Activity {
FrameLayout layout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
layout=(FrameLayout) findViewById(R.id.frameLayout1);
layout.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
int x=(int) event.getX();
int y=(int) event.getY();
Log.d("Nzm", "x="+x+"y="+y);
FrameLayout mFrame=new FrameLayout(MainActivity.this);
TextView tv=new TextView(MainActivity.this);
if(x!=0 && y!=0)
{
FrameLayout.LayoutParams mParams=new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
mFrame.setLayoutParams(mParams);
mFrame.setPadding(x, y, 0, 0);
tv.setLayoutParams(mParams);
tv.setText("Tooltip");
mFrame.addView(tv);
layout.addView(mFrame);
}
return true;
}
});
}
}