Question

在这个活动中，我有一个AppCompatCallback的实现和一个设置我的工具栏的委托，我有其他2个活动的这个东西，并且工作正常，但在这里我得到一个错误的行delegate1.setSupportActionBar（工具栏）..我不明白为什么......

import android.app.Activity;
import android.app.AlertDialog;
  import android.content.DialogInterface;
  import android.content.Intent;
   import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
   import android.net.Uri;
 import android.os.Bundle;
     import android.os.Environment;
  import android.support.annotation.Nullable;
    import android.support.v7.app.AppCompatCallback;
 import android.support.v7.app.AppCompatDelegate;
 import android.support.v7.view.ActionMode;
  import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
  import android.view.View;
import android.widget.AdapterView;
 import android.widget.Button;
  import android.widget.EditText;
  import android.widget.GridView;
     import android.widget.TextView;
  import android.widget.Toast;

 import java.io.File;
  import java.io.FileNotFoundException;
   import java.io.FileOutputStream;
  import java.io.InputStream;
  import java.io.OutputStream;
   import java.util.ArrayList;


 public class AlbumActivity extends Activity implements AppCompatCallback {


private final int REQUEST_CODE_CAMERA_IMAGE = 1000;
private final int REQUEST_CODE_EXTERNAL_IMAGE = 2000;
private AppCompatDelegate delegate1;
String nameAlbum;
// Declare variables
private String[] FilePathStrings;
private String[] FileNameStrings;
private File[] listFile;
GridView grid;
GridViewAdapter adapter;
File file;
boolean deleted;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    delegate1 = AppCompatDelegate.create(this, this);

    //call the onCreate() of the AppCompatDelegate
    delegate1.onCreate(savedInstanceState);

    //use the delegate to inflate the layout
    delegate1.setContentView(R.layout.album_activity);


    Toolbar toolbar = (Toolbar) findViewById(R.id.mytoolbarr);

    delegate1.setSupportActionBar(toolbar);
    delegate1.setTitle("Your Pictures");

    Button btnChoosePicture = (Button) findViewById(R.id.addimage);
    Intent intent = getIntent();
    nameAlbum = intent.getStringExtra("nameAlbum");
    // Check for SD Card
    if (!Environment.getExternalStorageState().equals(
            Environment.MEDIA_MOUNTED)) {
        Toast.makeText(this, "Error! No SDCARD Found!", Toast.LENGTH_LONG)
                .show();
    } else {
        // Locate the image folder in your SD Card
        file = new File(Environment.getExternalStorageDirectory()
                + File.separator + nameAlbum);
        if (file.isDirectory()) {
            listFile = file.listFiles();
            // Create a String array for FilePathStrings
            FilePathStrings = new String[listFile.length];
            // Create a String array for FileNameStrings
            FileNameStrings = new String[listFile.length];

            for (int i = 0; i < listFile.length; i++) {
                // Get the path of the image file
                FilePathStrings[i] = listFile[i].getAbsolutePath();
                // Get the name image file
                FileNameStrings[i] = listFile[i].getName();
            }
        }

        // Locate the GridView in gridview_main.xml
        grid = (GridView) findViewById(R.id.gridview);
        // Pass String arrays to LazyAdapter Class
        adapter = new GridViewAdapter(this, FilePathStrings, FileNameStrings);
        // Set the LazyAdapter to the GridView
        grid.setAdapter(adapter);

        // Capture gridview item click
        grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {

                Intent i = new Intent(AlbumActivity.this, ViewImage.class);
                // Pass String arrays FilePathStrings
                i.putExtra("filepath", FilePathStrings);
                // Pass String arrays FileNameStrings
                i.putExtra("filename", FileNameStrings);
                // Pass click position
                i.putExtra("position", position);
                startActivity(i);
            }

        });
        grid.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, final View view, final int position, final long id) {

                AlertDialog.Builder builder = new AlertDialog.Builder(AlbumActivity.this);


                builder.setCancelable(true);
                builder.setMessage("Are you sure you want to delete this picture ?");
                builder.setNeutralButton("Cancel", new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();

                    }

                });
                builder.setPositiveButton("Delete", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {


                        File filepath = Environment.getExternalStorageDirectory();
                        File dir5 = new File(filepath.getAbsolutePath()
                                + nameAlbum+FileNameStrings[position]);

                        File file3 = new File(String.valueOf(dir5));
                       deleted = file3.delete();
adapter.notifyDataSetChanged();
                        finish();
                        startActivity(getIntent());

                        dialog.dismiss();



                    }
                });

                builder.setTitle("Delete Picture");
                AlertDialog dialog = builder.create();
                dialog.show();
                return true;
            }
        });

            }


//select picture from external storage
        btnChoosePicture.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                // choose picture from gallery
                Intent PhotoPickerIntent = new Intent(
                        Intent.ACTION_PICK);
                File pictureDirectory = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
                String pictureDirectoryPath = pictureDirectory.getPath();
                Uri data = Uri.parse(pictureDirectoryPath);
                PhotoPickerIntent.setDataAndType(data, "image/*");


                startActivityForResult(PhotoPickerIntent,
                        REQUEST_CODE_EXTERNAL_IMAGE);


            }
        });
    }
@Override

Answer 1

但是这里我遇到了一行代码：delegate1.setSupportActionBar（toolbar）

这可能是两件不同的事情：

您已导入android.widget.Toolbar 而不是 android.support.v7.widget.Toolbar

如果您想使用Activity

，则AppCompatActivity必须展开setSupportActionBar(toolbar)

如果您延长AppCompatActivity，则必须使用Theme.AppCompat.Light.NoActionBar

Answer 2

@Skizo这里一切正常，并扩展了活动......

public class EnterDataActivity extends Activity implements AppCompatCallback {
private AppCompatDelegate delegate;
EditText editTextPersonName;


/**
 * Called when the activity is first created.
 */
@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    delegate = AppCompatDelegate.create(this, this);

    //call the onCreate() of the AppCompatDelegate
    delegate.onCreate(savedInstanceState);

    //use the delegate to inflate the layout
    delegate.setContentView(R.layout.enter_data);

    editTextPersonName = (EditText) findViewById(R.id.et_person_name);
    Toolbar toolbar= (Toolbar) findViewById(R.id.mytoolbar2);

    delegate.setSupportActionBar(toolbar);
    delegate.setTitle("Enter Album Name");

}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }else if(id==android.R.id.home){
       finish();
    }

    return super.onOptionsItemSelected(item);
}

public void onClickAdd (View btnAdd) {

    String personName = editTextPersonName.getText().toString();


    if ( personName.length() != 0 ) {

        Intent newIntent = getIntent();
        newIntent.putExtra("tag_person_name", personName);


        this.setResult(RESULT_OK, newIntent);

        finish();

    }
}

@Override
public void onSupportActionModeStarted(ActionMode mode) {

}

@Override
public void onSupportActionModeFinished(ActionMode mode) {

}

@Nullable
@Override
public ActionMode onWindowStartingSupportActionMode(ActionMode.Callback callback) {
    return null;
}

}

Answer 3

我确实解决了我的问题，我必须在我的活动布局中包含我的工具栏布局...感谢大家有兴趣解决我的问题!!

setSupportActionBar上的AppCompatCallback错误

3 个答案: