我有数据库保存在字符串格式中，然后我收到了字符串到android。现在我想将字符串转换为base64并将其设置为imageView。但我在将位图设置为imageView时遇到了麻烦。
这是我的代码：
/**
* @param encodedString
* @return bitmap (from given string)
*/
public Bitmap StringToBitMap(String encodedString){
try {
byte [] encodeByte=Base64.decode(encodedString,Base64.DEFAULT);
Bitmap bitmap=BitmapFactory.decodeByteArray(encodeByte, 0, encodeByte.length);
ImageView imageView=(ImageView)findViewById(R.id.ivProfilePic);
assert imageView != null;
imageView.setImageBitmap(bitmap);
return bitmap;
} catch(Exception e) {
e.getMessage();
return null;
}
}
然后我使用具有精确字符串'image'的参数调用此函数。
StringToBitMap(image);
My Mian Android Code：
public class Profile extends AppCompatActivity {
public String image;
public ImageView imageVieww;
public Bitmap bitmap;
public int PICK_IMAGE_REQUEST = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
ProfilePicRetrive();
StringToBitMap(image);
imageVieww=(ImageView)findViewById(R.id.ivProfilePic);
TextView tvUploadProfilePic = (TextView)findViewById(R.id.tvUploadProfilePic);
if (imageVieww != null) {
imageVieww.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showFileChooser();
}
});
}
assert tvUploadProfilePic != null;
tvUploadProfilePic.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String image = getStringImage(bitmap);
String user_id=UserDetails.user_id;
Response.Listener<String> responseListener = new Response.Listener<String>() {
final ProgressDialog pd = ProgressDialog.show(Profile.this,"", "Registering your Account", true);
@Override
public void onResponse(String response) {
try {
JSONObject jsonResponse = new JSONObject(response);
boolean success = jsonResponse.getBoolean("success");
if (success) {
pd.dismiss();
} else {
AlertDialog.Builder builder = new AlertDialog.Builder(Profile.this);
builder.setMessage("Register Failed")
.setNegativeButton("Retry", null)
.create()
.show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
};
ProfileRequest profileRequest = new ProfileRequest(image, user_id, responseListener);
RequestQueue queue = Volley.newRequestQueue(Profile.this);
queue.add(profileRequest);
}
});
}
private void ProfilePicRetrive () {
class GetEmployee extends AsyncTask<Void, Void, String> {
ProgressDialog loading;
@Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(Profile.this, "Fetching...", "Wait...", false, false);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
showEmployee(s);
}
@Override
protected String doInBackground(Void... params) {
RequestHandler rh = new RequestHandler();
String s = rh.sendGetRequestParam(Config.URL_GET_EMP, UserDetails.user_id);
return s;
}
}
GetEmployee ge = new GetEmployee();
ge.execute();
}
private void showEmployee(String json) {
try {
JSONObject jsonObject = new JSONObject(json);
JSONArray result = jsonObject.getJSONArray(Config.TAG_JSON_ARRAY);
JSONObject c = result.getJSONObject(0);
image = c.getString(Config.TAG_IMAGE);
Toast.makeText(getApplicationContext(),image,Toast.LENGTH_LONG).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
/**
* @param encodedString
* @return bitmap (from given string)
*/
public Bitmap StringToBitMap(String encodedString){
try {
byte [] encodeByte=Base64.decode(encodedString,Base64.DEFAULT);
Bitmap bitmap=BitmapFactory.decodeByteArray(encodeByte, 0, encodeByte.length);
ImageView test=(ImageView)findViewById(R.id.testt);
assert test != null;
test.setImageBitmap(Bitmap.createScaledBitmap(bitmap, 120, 120, false));
return bitmap;
} catch(Exception e) {
e.getMessage();
return null;
}
}
private void showFileChooser() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
Uri filePath = data.getData();
try {
//Getting the Bitmap from Gallery
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
//Setting the Bitmap to ImageView
imageVieww.setImageBitmap(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
}
public String getStringImage(Bitmap bmp){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG,30,baos);
byte[] imageBytes = baos.toByteArray();
return Base64.encodeToString(imageBytes, Base64.DEFAULT);
}
}
我的Xml代码（用于imageView和上传按钮）
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin">
<ImageView
android:layout_width="250dp"
android:layout_height="100dp"
android:id="@+id/ivProfilePic"
android:padding="10dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Upload"
android:id="@+id/tvUploadProfilePic"
android:layout_marginRight="40dp"
android:layout_marginEnd="40dp"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
</RelativeLayout>
这是我的错误，它是蓝色的：
07-17 13:54:29.093 9304-9304/com.cuboid.cuboid I/Choreographer: Skipped 36 frames! The application may be doing too much work on its main thread.
07-17 13:54:43.436 9304-9540/com.cuboid.cuboid W/System.err: java.net.SocketTimeoutException: failed to connect to allwaysready.16mb.com/31.170.164.89 (port 80) after 15000ms
07-17 13:54:43.436 9304-9540/com.cuboid.cuboid W/System.err: at libcore.io.IoBridge.connectErrno(IoBridge.java:169)
07-17 13:54:43.436 9304-9540/com.cuboid.cuboid W/System.err: at libcore.io.IoBridge.connect(IoBridge.java:122)
07-17 13:54:43.436 9304-9540/com.cuboid.cuboid W/System.err: at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)
07-17 13:54:43.436 9304-9540/com.cuboid.cuboid W/System.err: at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:456)
07-17 13:54:43.436 9304-9540/com.cuboid.cuboid W/System.err: at java.net.Socket.connect(Socket.java:882)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at com.android.okhttp.internal.Platform.connectSocket(Platform.java:174)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at com.android.okhttp.Connection.connect(Connection.java:152)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:276)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:211)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnection Impl.java:382)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at com.android.okhttp.internal.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:106)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at com.android.okhttp.internal.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:217)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at com.cuboid.cuboid.RequestHandler.sendPostRequest(RequestHandler.java:52)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at com.cuboid.cuboid.PostJobs$1AddJobs.doInBackground(PostJobs.java:129)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at com.cuboid.cuboid.PostJobs$1AddJobs.doInBackground(PostJobs.java:92)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:292)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
07-17 13:54:43.437 9304-9540/com.cuboid.cuboid W/System.err: at java.lang.Thread.run(Thread.java:818)
07-17 13:55:05.178 9304-9312/com.cuboid.cuboid I/art: Debugger is no longer active
07-17 13:55:29.775 9304-9312/com.cuboid.cuboid W/art: Suspending all threads took: 13.073ms