Update source code with grid layout and channel management

Major changes:
- Add ChannelAdapter for grid display functionality
- Add ChannelRepository for data management
- Add PlayerActivity for dedicated video playback
- Add StreamChannel model for channel representation
- Update MainActivity to support grid layout
- Update activity_main.xml with grid UI components
- Add channel item layouts and drawables
- Update AndroidManifest.xml with new activity
- Update build.gradle dependencies

This implements the requested "grilla arreglada" functionality with proper channel grid display and management.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/src/main/java/com/streamplayer/MainActivity.java

@@ -1,157 +1,29 @@
 package com.streamplayer;
 
+import android.content.Intent;
 import android.os.Bundle;
-import android.os.StrictMode;
-import android.view.View;
-import android.widget.ProgressBar;
-import android.widget.TextView;
 
 import androidx.appcompat.app.AppCompatActivity;
-
-import com.google.android.exoplayer2.ExoPlayer;
-import com.google.android.exoplayer2.MediaItem;
-import com.google.android.exoplayer2.PlaybackException;
-import com.google.android.exoplayer2.Player;
-import com.google.android.exoplayer2.ui.PlayerView;
+import androidx.recyclerview.widget.GridLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
 
 public class MainActivity extends AppCompatActivity {
 
-    private ExoPlayer player;
-    private PlayerView playerView;
-    private ProgressBar loadingIndicator;
-    private TextView errorMessage;
-
-    private static final String STREAM_PAGE_URL = "https://streamtpmedia.com/global2.php?stream=espn";
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-
-        // Configurar política de red para allow cleartext traffic
-        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
-        StrictMode.setThreadPolicy(policy);
-
         setContentView(R.layout.activity_main);
 
-        initViews();
-
-        // Configurar DNS de Google para streaming
-        DNSSetter.configureDNSToGoogle(this);
-
-        initializePlayer();
-    }
-
-    private void initViews() {
-        playerView = findViewById(R.id.player_view);
-        loadingIndicator = findViewById(R.id.loading_indicator);
-        errorMessage = findViewById(R.id.error_message);
-    }
-
-    private void initializePlayer() {
-        showLoading(true);
-        new Thread(() -> {
-            try {
-                String resolvedUrl = StreamUrlResolver.resolve(STREAM_PAGE_URL);
-                runOnUiThread(() -> startPlayback(resolvedUrl));
-            } catch (Exception e) {
-                runOnUiThread(() -> showError("Error al obtener stream: " + e.getMessage()));
-            }
-        }).start();
-    }
-
-    private void startPlayback(String streamUrl) {
-        try {
-            releasePlayer();
-            player = new ExoPlayer.Builder(this).build();
-            playerView.setPlayer(player);
-
-            player.addListener(new Player.Listener() {
-                @Override
-                public void onPlaybackStateChanged(int playbackState) {
-                    switch (playbackState) {
-                        case Player.STATE_BUFFERING:
-                            showLoading(true);
-                            break;
-                        case Player.STATE_READY:
-                            showLoading(false);
-                            break;
-                        case Player.STATE_ENDED:
-                            // Video terminado
-                            break;
-                    }
-                }
-
-                @Override
-                public void onPlayerError(PlaybackException error) {
-                    showError("Error al reproducir: " + error.getMessage());
-                }
-            });
-
-            MediaItem mediaItem = MediaItem.fromUri(streamUrl);
-            player.setMediaItem(mediaItem);
-            player.prepare();
-            player.setPlayWhenReady(true);
-
-        } catch (Exception e) {
-            showError("Error al inicializar reproductor: " + e.getMessage());
-        }
-    }
-
-    private void showLoading(boolean show) {
-        loadingIndicator.setVisibility(show ? View.VISIBLE : View.GONE);
-        errorMessage.setVisibility(View.GONE);
-        playerView.setVisibility(show ? View.GONE : View.VISIBLE);
-    }
-
-    private void showError(String message) {
-        loadingIndicator.setVisibility(View.GONE);
-        playerView.setVisibility(View.GONE);
-        errorMessage.setVisibility(View.VISIBLE);
-        errorMessage.setText(message);
-    }
-
-    @Override
-    protected void onStart() {
-        super.onStart();
-        if (player != null) {
-            playerView.onResume();
-        }
-    }
-
-    @Override
-    protected void onResume() {
-        super.onResume();
-        if (player != null) {
-            playerView.onResume();
-        }
-    }
-
-    @Override
-    protected void onPause() {
-        super.onPause();
-        if (player != null) {
-            playerView.onPause();
-        }
-    }
-
-    @Override
-    protected void onStop() {
-        super.onStop();
-        if (player != null) {
-            playerView.onPause();
-        }
-    }
-
-    @Override
-    protected void onDestroy() {
-        super.onDestroy();
-        releasePlayer();
-    }
-
-    private void releasePlayer() {
-        if (player != null) {
-            player.release();
-            player = null;
-        }
+        RecyclerView recyclerView = findViewById(R.id.channel_grid);
+        recyclerView.setLayoutManager(new GridLayoutManager(this, 3));
+        ChannelAdapter adapter = new ChannelAdapter(
+                ChannelRepository.getChannels(),
+                channel -> {
+                    Intent intent = new Intent(MainActivity.this, PlayerActivity.class);
+                    intent.putExtra(PlayerActivity.EXTRA_CHANNEL_NAME, channel.getName());
+                    intent.putExtra(PlayerActivity.EXTRA_CHANNEL_URL, channel.getPageUrl());
+                    startActivity(intent);
+                });
+        recyclerView.setAdapter(adapter);
     }
 }