创建新意图时出错 [英] error on creating new intent
本文介绍了创建新意图时出错的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
MainActivity有什么问题.在这里:
what's wrong with MainActivity.this here:
Intent myIntent = new Intent(MainActivity.this, SecondActivity.class);
当我按下Ctrl + Space时,它提示MainActivity.this,但随后出现错误:
when I press Ctrl+Space it suggest MainActivity.this but then rais an error :
这是Java:
package com.example.explicitintent;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, 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);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
Button btn = (Button)rootView.findViewById(R.id.button1);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Intent myIntent = new Intent(MainActivity.this, SecondActivity.class);
startActivity(myIntent);
}
});
return rootView;
}
}
}
这是错误:
推荐答案
尝试一下..
如果您在扩展Activity
中使用该意图,则您的方法是正确的,但是扩展Fragment
请在下面尝试使用getActivity()
If you use that intent in extends Activity
your method is correct but your extends Fragment
try below use getActivity()
Intent myIntent = new Intent(getActivity(), SecondActivity.class);
startActivity(myIntent);
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