网上那个HelloWorld出错了 上面也加了import android.widget.TextView; 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 没问题啊!@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); TextView tv = new TextView(this); tv.setText("这是一个测试Android的helloWorld"); setContentView(tv); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); TextView tv = new TextView(this); tv.setText("这是一个测试Android的helloWorld"); setContentView(tv); if (savedInstanceState == null) { getSupportFragmentManager().beginTransaction() .add(R.id.container, new PlaceholderFragment()).commit(); } } 是这些吗2014-03-19 16:11:50 - Emulator] [2014-03-19 16:11:50 - Helloworld] New emulator found: emulator-5554[2014-03-19 16:11:50 - Helloworld] Waiting for HOME ('android.process.acore') to be launched...[2014-03-19 16:13:53 - Helloworld] HOME is up on device 'emulator-5554'[2014-03-19 16:13:53 - Helloworld] Uploading Helloworld.apk onto device 'emulator-5554'[2014-03-19 16:13:54 - Helloworld] Installing Helloworld.apk...[2014-03-19 16:15:00 - Helloworld] Success![2014-03-19 16:15:00 - Helloworld] Starting activity com.example.helloworld.MainActivity on device emulator-5554[2014-03-19 16:15:04 - Helloworld] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.example.helloworld/.MainActivity } 贴出LogCat我成功了,是删除了if (savedInstanceState == null) { getSupportFragmentManager().beginTransaction() .add(R.id.container, new PlaceholderFragment()).commit(); } 这段代码就可以了,请问是怎么回事呢 TextView tv = new TextView(this);tv.setText("这是一个测试Android的helloWorld");写在public static class PlaceholderFragment extends Fragment {的onCreateView里 android listview里有checkbox 和edittext,edittext无法弹出输入框 求助,Android多个定时任务 NOTE: attach of thread 'Binder Thread #3' 错误 问个基础问题关于ONCREAT [Android UI界面] Activity跳转不成功 Android 网络监控问题 长按响应在真机上不能实现 关于沙箱技术 请问写一个instagram的小插件 Android 多用户如何实现数据共享? createBitmap+matrix平移的问题 android 2.1 怎么实现listview自动滚动
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView tv = new TextView(this);
tv.setText("这是一个测试Android的helloWorld");
setContentView(tv);
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView tv = new TextView(this);
tv.setText("这是一个测试Android的helloWorld");
setContentView(tv); if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}
2014-03-19 16:11:50 - Emulator]
[2014-03-19 16:11:50 - Helloworld] New emulator found: emulator-5554
[2014-03-19 16:11:50 - Helloworld] Waiting for HOME ('android.process.acore') to be launched...
[2014-03-19 16:13:53 - Helloworld] HOME is up on device 'emulator-5554'
[2014-03-19 16:13:53 - Helloworld] Uploading Helloworld.apk onto device 'emulator-5554'
[2014-03-19 16:13:54 - Helloworld] Installing Helloworld.apk...
[2014-03-19 16:15:00 - Helloworld] Success!
[2014-03-19 16:15:00 - Helloworld] Starting activity com.example.helloworld.MainActivity on device emulator-5554
[2014-03-19 16:15:04 - Helloworld] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.example.helloworld/.MainActivity }
if (savedInstanceState == null) { getSupportFragmentManager().beginTransaction() .add(R.id.container, new PlaceholderFragment()).commit(); }
这段代码就可以了,请问是怎么回事呢
tv.setText("这是一个测试Android的helloWorld");写在public static class PlaceholderFragment extends Fragment {的onCreateView里