错误的重点是:**把最后Activity接收Activity1传来的数据代码,放在一个按钮中就完全正确,但是要是放在onCreate中,就崩溃报空指针**
程序先是Activity跳到Activity1,然后从Activity1中获取字符串传递回Activity中。
下面是Activity跳转到Activity1的代码:
Intent intent=new Intent();
intent.setClass(MainActivity.this,MainActivity1.class);
startActivity(intent);
MainActivity.this.finish();
下面是Activity1向Activity传递数据的代码:
String orgin = orginEdit.getText().toString();
String destination = destinationEdit.getText().toString();
Intent intent=new Intent();
Bundle orgin1 = new Bundle();
Bundle destination1 = new Bundle();
orgin1.putString("orgin1", orgin);
destination1.putString("destination1",destination);
intent.putExtras(orgin1);
intent.putExtras(destination1);
startActivity(intent);
下面是Activity接收数据的代码
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = getIntent();
Bundle og = intent.getExtras();
Bundle de = intent.getExtras();
String orgin1 = og.getString("orgin1");//???????????????????????????????????????????????????
String destination1 = de.getString("destination1");
将这段接收数据的代码放在一个按钮中就没有任何问题,可以正常执行,但是放在onCreate中,getExtras就报空指针
Manifest文件如下:
android:name="com.example.citysearch_duty.MainActivity"
android:label="@string/app_name" >
<category android:name="android.`intent`.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.example.citysearch_duty.MainActivity1"
android:label="@string/title_activity_main_activity1" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
第一次提问,不懂格式,多多谅解~~请各位帮忙解答一下,小女子在此拜谢~~