Question

我正在使用一个应用程序，其中显示一个活动3秒钟，然后启动下一个活动。我成功完成了以下代码：

// shows the picture for 3 seconds, then takes the user to GamePlay 
    final Handler handler = new Handler();
    handler.postDelayed(new Runnable() {
        public void run() {

            Intent intent = new Intent(ShowImage.this, GamePlay.class);

            ShowImage.this.startActivity(intent);
            ShowImage.this.finish();
        }
    }, 3000);

此活动还显示图片，我想将图片的ID传递给下一个活动。我知道可以通过使用以下代码（来自经验，在另一个Activity中）完成（我尝试将其插入上面的空行）：

this.putExtra("id", selected_image);

但是，我收到错误＆＃34;方法putExtra（String，int）未定义类型new Runnable（）{}＆＃34;

我的问题是，如何将图片ID传递给下一个活动，同时包含3秒的延迟？

以下是活动代码的其余部分：

import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.GridView;
import android.widget.Toast;

public class ShowImage extends ActionBarActivity {

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

@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();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    // shows the activity
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_show_image);

    // get intent data
    Intent intent = getIntent();

    // get the selected image id and crop the image
    final int selected_image = (Integer) intent.getExtras().getInt("id");
    Bitmap [] croppedBitmap = CreateBitmap.createBitmap(this, selected_image, 3);

        // create GridView for pictures to be showed in
        GridView grid_layout =  (GridView) findViewById(R.id.grid_layout);

        // pass the array with pieces to the image adapter
        grid_layout.setAdapter(new CroppedImageAdapter(this, croppedBitmap));

        // test text
        Toast.makeText(this, String.valueOf(selected_image), Toast.LENGTH_LONG).show();

    // shows the picture for 3 seconds, then takes the user to GamePlay 
    final Handler handler = new Handler();
    handler.postDelayed(new Runnable() {
        public void run() {

            Intent intent = new Intent(ShowImage.this, GamePlay.class);
            this.putExtra("id", selected_image);
            ShowImage.this.startActivity(intent);
            ShowImage.this.finish();
        }
    }, 3000);
}
}

Answer 1

更改

  this.putExtra("id", selected_image);

到

  intent.putExtra("id", selected_image);

Answer 2

尝试使用

intent.putExtra("id", selected_image);

而不是：

this.putExtra("id", selected_image);

代码中

注意此是处理程序的引用，您使用意图引用传递意图数据而不是此参考。

将整数传递给处理程序中的活动

2 个答案: