MarkdownActivity.java

package com.seafile.seadroid2.ui.activity;

import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import com.seafile.seadroid2.R;
import com.seafile.seadroid2.util.Utils;
import us.feras.mdv.MarkdownView;

import java.io.File;

/**
 * For showing markdown files
 */
public class MarkdownActivity extends BaseActivity implements Toolbar.OnMenuItemClickListener {

    @SuppressWarnings("unused")
    private static final String DEBUG_TAG = "MarkdownActivity";

    private MarkdownView markdownView;

    String path;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_markdown);

        Intent intent = getIntent();
        path = intent.getStringExtra("path");

        if (path == null) return;

        markdownView = (MarkdownView) findViewById(R.id.markdownView);
        Toolbar toolbar = getActionBarToolbar();
        toolbar.setOnMenuItemClickListener(this);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }
    
    @Override
    public void onResume() {
        super.onResume();
        File file = new File(path);
        if (!file.exists())
            return;

        String content = Utils.readFile(file);
        markdownView.loadMarkdown(content);
        getSupportActionBar().setTitle(file.getName());
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getActionBarToolbar().inflateMenu(R.menu.markdown_view_menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                finish();
                break;
            case R.id.edit_markdown:
                edit();
                break;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public boolean onMenuItemClick(MenuItem item) {
        return super.onOptionsItemSelected(item);
    }

    private void edit() {
        PackageManager pm = getPackageManager();

        // First try to find an activity who can handle markdown edit
        Intent editAsMarkDown = new Intent(Intent.ACTION_EDIT);

        Uri uri = Uri.parse(path);
        String mime = "text/markdown";
        editAsMarkDown.setDataAndType(uri, mime);

        if (pm.queryIntentActivities(editAsMarkDown, 0).size() > 0) {
            // Some activity can edit markdown
            startActivity(editAsMarkDown);
        } else {
            // No activity to handle markdown, take it as text
            Intent editAsText = new Intent(Intent.ACTION_EDIT);
            mime = "text/plain";
            editAsText.setDataAndType(uri, mime);

            try {
                startActivity(editAsText);
            } catch (ActivityNotFoundException e) {
                showShortToast(this, getString(R.string.activity_not_found));
            }
        }
    }

}