【移动应用开发技术】Android TextView中如何显示图片

【移动应用开发技术】AndroidTextView中如何显示图片

1、XML文件中指定属性值<TextView

android:id="@+id/textview_01"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:drawableTop="@drawable/ic_launcher"

android:text="hello_world"

/>mTextView01.setCompoundDrawablesWithIntrinsicBounds(null,

getResources().getDrawable(R.drawable.ic_launcher,

null),

null,

null);/upload/information/20200623/125/123887.pngandroid:drawablePadding="10dp"mTextView01.setCompoundDrawablePadding(10);2、通过解析HTML来显示图片显示项目中图片//

第二种方式：显示项目中的图片mTextView02

=

(TextView)

findViewById(R.id.textview_02);//

把图片生成的ID加入img标签中

<img

src='123'>String

htmlFor02

=

"项目图片测试："

+

"<img

src='"

+

R.drawable.ic_launcher

+

"'>"

+

"<img

src='"

+

R.drawable.apple

+

"'>";

mTextView02.setText(Html.fromHtml(htmlFor02,

new

Html.ImageGetter()

{

@Override

public

Drawable

getDrawable(String

source)

{

Log.d(TAG,

"项目图片测试_source:"

+

source);

int

id

=

Integer.parseInt(source);

Drawable

drawable

=

getResources().getDrawable(id,

null);

drawable.setBounds(0,

0,

drawable.getIntrinsicWidth()

,

drawable.getIntrinsicHeight());

return

drawable;

}

},

null));

/upload/information/20200623/125/123888.png获取网络图片private

static

final

String

htmlFor03

=

"网络图片测试："

+

"<img

src='/it/u=4190601239,967361436&fm=11&gp=0.jpg'>";private

static

final

String

NET_PIC_NAME

=

"NetPic.png";//

第二种方式：显示网络图片mTextView03

=

(TextView)

findViewById(R.id.textview_03);

mTextView03.setText(Html.fromHtml(htmlFor03,

mNetWorkImageGetter,

null));private

NetWorkImageGetter

mNetWorkImageGetter

=

new

NetWorkImageGetter();

class

NetWorkImageGetter

implements

Html.ImageGetter

{

/*

*

(non-Javadoc)

*

@see

android.text.Html.ImageGetter#getDrawable(java.lang.String)

*/

@Override

public

Drawable

getDrawable(String

source)

{

Drawable

drawable

=

null;

File

file

=

new

File(Environment.getExternalStorageDirectory(),

NET_PIC_NAME);

if

(file.exists())

{

drawable

=

Drawable.createFromPath(file.getAbsolutePath());

drawable.setBounds(0,

0,

drawable.getIntrinsicWidth()

*

2,

drawable.getIntrinsicHeight()

*

2);

}

else

{

getNetworkImg(source);

}

return

drawable;

}

}/**

*

通过volley请求网络图片

*

@param

url

*/private

void

getNetworkImg(String

url)

{

Log.d(TAG,

"url:

"

+

url);

RequestQueue

queue

=

Volley.newRequestQueue(this);

ImageRequest

request

=

new

ImageRequest(url,

new

Response.Listener<Bitmap>()

{

@Override

public

void

onResponse(Bitmap

bitmap)

{

Log.d(TAG,

"onResponse");

saveMyBitmap(NET_PIC_NAME,

bitmap);

mTextView03.setText(Html.fromHtml(htmlFor03,

mNetWorkImageGetter,

null));

}

},

0,

0,

ScaleType.CENTER,

Config.RGB_565,

new

ErrorListener()

{

@Override

public

void

onErrorResponse(VolleyError

error)

{

Log.d(TAG,

"onErrorResponse:"

+

error);

}

});

queue.add(request);

}/**

*

保存获取到的网络图片到sdcard

*

@param

bitName

*

@param

mBitmap

*/public

void

saveMyBitmap(String

bitName,

Bitmap

mBitmap)

{

File

f

=

new

File("/sdcard/"

+

bitName);

try

{

f.createNewFile();

}

catch

(IOException

e)

{

}

FileOutputStream

fOut

=

null;

try

{

fOut

=

new

FileOutputStream(f);

}

catch

(FileNotFoundException

e)

{

e.printStackTrace();

}

mBpress(Bitmap.CompressFormat.PNG,

100,

fOut);

try

{

fOut.flush();

}

catch

(IOException

e)

{

e.printStackTrace();

}

try

{

fOut.close();

}

catch

(IOException

e)

{

e.printStackTrace();

}

}/upload/information/20200623/125/123889.png3、通过ImageSpan和SpannableString//

第三种方式

mTextView04

=

(TextView)

findViewById(R.id.textview_04);ImageSpan

imgSpan

=

new

ImageSpan(this,

R.drawable.apple);SpannableString

spannableString

=

new

SpannableString("012345");spannableString.setSpan(imgSpan,

1,

5,

Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);mTextView04.setText(spannableString);/upload/information/20200623/125/123890.png4、通过继承TextView方式public

class

MyTextView

extends

TextView

{

private

Bitmap

mBitmap;

/**

*

@param

context

*

@param

attrs

*/

public

MyTextView(Context

context,

AttributeSet

attrs)

{

super(context,

attrs);

mBitmap

=

BitmapFactory.decodeResource(context.getResources(),

R.drawable.apple);

setTextSize(40);

}

@Override

protected

void

onDraw(Canvas

canvas)

{

canvas.drawBitmap(mBitmap,

0,

0,

getPaint());

super.onDraw(canvas);