Question

我能够加载启动画面，但是当MainActivty加载应用程序崩溃时，我想在启动画面之后加载Main Activity。此外，我发现前面的堆栈溢出讨论了相同的主题，但是没有帮了我。

初始屏幕的行为符合预期，但应用程序在显示主要活动之前崩溃。主要活动是带有图像适配器的网格视图，该适配器将选定的项目从网格视图放大到屏幕底部的图像视图组件。

这是课堂的最后一个项目。

SplashActivity

package net.androidbootcamp.catchofthedayfishingapp;

import android.content.Intent;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import java.util.Timer; 
import java.util.TimerTask;

public class SplashActivity extends AppCompatActivity {
MediaPlayer mpReel;
int playing;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);

    getSupportActionBar().setDisplayShowHomeEnabled(true);
    getSupportActionBar().setLogo(R.mipmap.ic_launcher);
    getSupportActionBar().setDisplayUseLogoEnabled(true);

    mpReel = new MediaPlayer();
    mpReel = MediaPlayer.create(this, R.raw.reel);
    playing = 0;
    mpReel.start();

    TimerTask task = new TimerTask() {
        @Override
        public void run() {
            mpReel.stop();
            finish();
            startActivity(new Intent(SplashActivity.this, MainActivity.class));
        } // end run
    }; // end new TimerTask

    // schedule splash screen to be displayed for 5 seconds (= 5000 ms)
    Timer opening = new Timer();
    opening.schedule(task, 5000);
} // end onCreate
}

MainActivty

package net.androidbootcamp.catchofthedayfishingapp;

import android.content.Context;
import android.media.Image;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
Integer[] Animals = {R.drawable.bluefin, R.drawable.yellowtail, R.drawable.barracuda, 
R.drawable.seabass, R.drawable.bass, R.drawable.rainbow,};
ImageView pic;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    getSupportActionBar().setDisplayShowHomeEnabled(true);
    getSupportActionBar().setLogo(R.mipmap.ic_launcher);
    getSupportActionBar().setDisplayUseLogoEnabled(true);

    GridView grid = (GridView)findViewById(R.id.gridView);
    final ImageView pic = (ImageView)findViewById(R.id.imgLarge);

    grid.setAdapter(new ImageAdapter(this));

    grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Toast.makeText(getBaseContext(), "Selected Species " + (position+1), Toast.LENGTH_SHORT).show();
            pic.setImageResource(Animals[position]);
        }
    });
}

public class ImageAdapter extends BaseAdapter {
    private Context context;
    public ImageAdapter (Context c) {
        context = c;
    }

    @Override
    public int getCount() {
        return Animals.length;
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        pic = new ImageView(context);
        pic.setImageResource(Animals[position]);
        pic.setScaleType(ImageView.ScaleType.FIT_XY);
        pic.setLayoutParams(new GridView.LayoutParams(300,270));
        return pic;
    }
} // end class ImageAdapter
}

Android Studio：启动屏幕后，GridView崩溃

0 个答案: