设置处于折叠工具栏中的TextView和ImageView的对比颜色

我在Collapsing Toolbar中有ImageView和TextView。该图像将从服务器动态加载。问题是当我为TextView（白色或黑色）设置颜色时，它与图像的颜色以某种方式矛盾。由于我是初学者，我不知道如何解决它。任何人都可以帮助我吗？设置处于折叠工具栏中的TextView和ImageView的对比颜色

公告活动

public class AnnouncementDetailsActivity extends AppCompatActivity { 


    private TextView mTitle; 
    private TextView mDescription; 
    private ImageView image; 
    private ProgressDialog progressDialog; 

    private String mAnnouncementTitle; 
    private String mAnnouncementDescription; 

    private String mAnnounceImage; 


    public GetAnnouncementTask mGetAnnouncement = null; 

    private String DateString = DateFormat.getDateInstance(DateFormat.SHORT).format(Calendar.getInstance().getTime()); 

    private static final String TAG = "AnnouncementDetailsActivity"; 

    public static final String TAG_ANNOUNCEMENT_LIST_FRAGMENT = "announcement_list_fragment"; 

    private CollapsingToolbarLayout collapsingToolbar; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 


     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { 
      Window window = getWindow(); 
      window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS); 
      window.setStatusBarColor(Color.rgb(38, 55, 98)); 

     } 

     setContentView(R.layout.activity_announcement_details); 

     mTitle = (TextView) findViewById(R.id.announcement_title); 
     mDescription = (TextView) findViewById(R.id.description); 
     image = (ImageView) findViewById(R.id.announcement_image); 


     collapsingToolbar = (CollapsingToolbarLayout) findViewById(R.id.detail_collapse_toolbar); 
     collapsingToolbar.setTitle(mAnnouncementTitle); 

// 
//  collapsingToolbar.setCollapsedTitleTextColor(getResources().getColor(android.R.color.black)); 

     collapsingToolbar.setExpandedTitleColor(getResources().getColor(android.R.color.black)); 

     setSupportActionBar((Toolbar) findViewById(R.id.detail_announcement_toolbar)); 

     getSupportActionBar().setDisplayHomeAsUpEnabled(true); 

     getSupportActionBar().setDisplayShowTitleEnabled(false); 

     Intent intent = getIntent(); 


     if (null != intent) { 
      mAnnouncementTitle = intent.getStringExtra("announceTitle"); 
      mAnnouncementDescription = intent.getStringExtra("announceDescription"); 
      mAnnounceImage = intent.getStringExtra("announceImage"); 

      mTitle.setText(mAnnouncementTitle); 
      mDescription.setText(mAnnouncementDescription); 
      new GetAnnouncementTask(image) 
        .execute(mAnnounceImage); 
     } 
    } 


    public class GetAnnouncementTask extends AsyncTask<String, Void, Bitmap> { 


     ImageView image; 

     public GetAnnouncementTask(ImageView bmImage) { 
      this.image = bmImage; 
     } 

     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 


     } 

     protected Bitmap doInBackground(String... urls) { 
      String url = urls[0]; 
      Bitmap mIcon = null; 
      try { 
       InputStream in = new java.net.URL(url.replaceAll(" ", "%20")).openStream(); 
       mIcon = BitmapFactory.decodeStream(in); 
      } catch (Exception e) { 
       Log.e("Error", e.getMessage()); 
      } 
      return mIcon; 
     } 

     protected void onPostExecute(Bitmap result) { 
      image.setImageBitmap(result); 
     } 


    } 


    @Override 
    public void onBackPressed() { 
     super.onBackPressed(); 
    } 

    public boolean onOptionsItemSelected(MenuItem item) { 
     onBackPressed(); 

     return true; 
    } 
}

来源

2016-04-28 Pauline

您可以更加具体地发布一些代码或图像以准确定义您想要执行的操作吗？ – Chami

是的，我上传了我的代码.. – Pauline

可以根据图像的颜色（其图像在文字的背景）改变TextView颜色。 Android中有Palette和Swatch，请参阅here和here以获取教程

来源

2016-04-28 08:54:49

设置处于折叠工具栏中的TextView和ImageView的对比颜色

回答

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