Question

我在我的应用中创建了一个通知，但是当我点击按钮显示它时，从不显示并且日志猫没有显示任何错误。我不知道该怎么做。

import android.support.v4.app.NotificationCompat;

Intent resultIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("content://" + fileDir));
    PendingIntent resultPendingIntent =
            PendingIntent.getActivity(
                    this,
                    0,
                    resultIntent, /* <---- el intent que se realiza al hacer click*/
                    PendingIntent.FLAG_UPDATE_CURRENT
            );

    //TODO creamos notificacion
    NotificationCompat.Builder mBuilder =
             new NotificationCompat.Builder(this)
                    .setSmallIcon(R.mipmap.ic_launcher)
                    .setWhen(System.currentTimeMillis())
                    .setTicker("Downloader PRO")
                    .setContentTitle(getText(R.string.notificacion_titulo))
                    .setContentText("prueba")
                    .setContentIntent(resultPendingIntent)
                    .setContentInfo(getText(R.string.notificacion_informacion));

    mBuilder.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION));

    //TODO mostramos la notificacion

    // Sets an ID for the notification
    int mNotificationId = 001;
    // Gets an instance of the NotificationManager service
    NotificationManager mNotifyMgr =
            (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    // Builds the notification and issues it.
    mNotifyMgr.notify(mNotificationId, mBuilder.build());

完整课程：

package com.toniapps.downloaderpro;

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.provider.MediaStore;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Patterns;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.FileAsyncHttpResponseHandler;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import cz.msebera.android.httpclient.Header;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    //recibir información
    Intent intent = getIntent();
    String action = intent.getAction();
    String type = intent.getType();

    if (Intent.ACTION_SEND.equals(action) && type != null) {
        if ("text/plain".equals(type)) {
            handleSendText(intent); // Handle text being sent
        } else if (type.startsWith("image/")) {
            handleSendImage(intent); // Handle single image being sent
        }
    }


   FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            descargarB(view);
        }
    });
}

void handleSendText(Intent intent) {
    String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);
    if (sharedText != null) {
        if(sharedText.contains("Tweet")){
            twitter(sharedText);
        }else{
            String enlace = decodificarUrl(sharedText);
            urlCompartida(enlace);
            buscar(enlace);
        }
    }
}

void handleSendImage(Intent intent) {
    Uri imageUri = (Uri) intent.getParcelableExtra(Intent.EXTRA_STREAM);
    if (imageUri != null) {
        try {
            Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
            guardarImagen(bitmap);
        } catch (IOException e) {
            Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_LONG).show();
        }
    }
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return false;
}

@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;
    }

    return super.onOptionsItemSelected(item);
}
    public void buscarB(View view){
        EditText urlT = (EditText) findViewById(R.id.url_text_view);
        String url = urlT.getText().toString();

        if (url.contains("instagram")){
            instagram();
        }else {
            buscar(url);
        }
    }
    private void buscar(String url){
        AsyncHttpClient client = new AsyncHttpClient();



        client.get(url, new FileAsyncHttpResponseHandler(/* Context */ this) {
            @Override
            public void onFailure(int statusCode, Header[] headers, Throwable throwable, File file) {
                Toast.makeText(MainActivity.this, throwable.getMessage(), Toast.LENGTH_LONG).show();
            }

            @Override
            public void onSuccess(int statusCode, Header[] headers, File file) {
                ImageView imagen = (ImageView) findViewById(R.id.imagen);
                imagen.setImageBitmap(BitmapFactory.decodeFile(file.getAbsolutePath()));
            }
        });
    }
    public void descargarB(View view){
        EditText urlT = (EditText) findViewById(R.id.url_text_view);
        String url = urlT.getText().toString();

        if (url.contains("instagram")){
            instagram();
        }else {
            descargar(url);
        }


    }

private void descargar(String url) {
    AsyncHttpClient client = new AsyncHttpClient();


    client.get(url, new FileAsyncHttpResponseHandler(/* Context */ this) {
        @Override
        public void onFailure(int i, Header[] headers, Throwable throwable, File file) {
            Toast.makeText(MainActivity.this, throwable.getMessage(), Toast.LENGTH_LONG).show();
        }

        @Override
        public void onSuccess(int i, Header[] headers, File file) {

            ImageView imagen = (ImageView) findViewById(R.id.imagen);
            imagen.setImageBitmap(BitmapFactory.decodeFile(file.getAbsolutePath()));

            Bitmap imagenSC = BitmapFactory.decodeFile(file.getAbsolutePath());

            ByteArrayOutputStream bytes = new ByteArrayOutputStream();
            imagenSC.compress(Bitmap.CompressFormat.PNG, 100, bytes);
            File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES + "/Downloader_PRO/");
            path.mkdirs();
            File imageFile = new File(path, (file.getName() + ".png"));
            try {
                imageFile.createNewFile();
                FileOutputStream fo = new FileOutputStream(imageFile);
                fo.write(bytes.toByteArray());
                fo.flush();
                fo.close();
                Toast.makeText(MainActivity.this, imageFile.getAbsolutePath(), Toast.LENGTH_LONG).show();
            } catch (IOException e) {
                e.printStackTrace();
                Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_LONG).show();
                }
            }
        });
    }
    private void guardarImagen(Bitmap bitmap) {
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, bytes);
        File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES + "/Downloader_PRO/");
        path.mkdirs();
        File imageFile = new File(path, (bitmap.getByteCount()+".png"));
        try {
            imageFile.createNewFile();
            FileOutputStream fo = new FileOutputStream(imageFile);
            fo.write(bytes.toByteArray());
            fo.flush();
            fo.close();
            crearNotificacionDescarga(imageFile.getAbsolutePath());
            Toast.makeText(MainActivity.this, imageFile.getAbsolutePath(), Toast.LENGTH_LONG).show();
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_LONG).show();
        }
    }
    private void urlCompartida(String url){
        EditText urlT = (EditText) findViewById(R.id.url_text_view);
        urlT.setText(url);
    }
    private String decodificarUrl(String urlBase){

        ArrayList links = new ArrayList();
        String urlStr ="";
        Pattern p = Patterns.WEB_URL;
        Matcher m = p.matcher(urlBase);
        while(m.find()) {
            urlStr = m.group();
            if (urlStr.startsWith("(") && urlStr.endsWith(")")) {
                urlStr = urlStr.substring(1, urlStr.length() - 1);
            }
            links.add(urlStr);
        }
        return urlStr;
    }
    private void twitter(final String tweetText){
        new AlertDialog.Builder(this)
                .setTitle(getText(R.string.Twitter_titulo))
                .setMessage(getText(R.string.Twitter_mensaje_uno) + "\n" + "\n" + getText(R.string.Twitter_mensaje_dos))
                .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        String enlace = decodificarUrl(tweetText);
                        Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(enlace));
                        startActivity(browserIntent);
                        dialog.dismiss();
                    }
                })
                .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        // do nothing
                    }
                })
                .setIcon(R.drawable.ic_warning_black_48dp)
                .show();
    }
private void instagram(){
    new AlertDialog.Builder(this)
            .setTitle(getText(R.string.instagram_titulo))
            .setMessage(getText(R.string.instagram_mensaje_1) + "\n" + "\n" + getText(R.string.instagram_mensaje_2))
            .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {

                }
            })
            .setIcon(R.drawable.ic_warning_black_48dp)
            .show();
}
private void crearNotificacionDescarga(String fileDir){

    new Intent(Intent.ACTION_VIEW, Uri.parse("content://" + fileDir));


}
}

IDK现在要做什么，在任何设备上工作......

Answer 1

替换行：

NotificationManager mNotifyMgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

使用：

NotificationManager mNotifyMgr = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

在“设置”中选择“应用”，选择您感兴趣的应用，然后设置“显示通知”复选框。

我的通知从未显示过

1 个答案: