I follow the tutorial android official website made the first android app, but when you do the test found on my nexus4 phone program after completing the first activity can not enter the second activity. We want to help look great God, thank you!
package com.example.myfirstapp;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends Activity {
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
@ Override
protected void onCreate (Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_main);
}
@ 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;
}
public void sendMessge (View view) {
Intent intent = new Intent (this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById (R.id.edit_message);
String message = editText.getText () toString ();.
intent.putExtra (EXTRA_MESSAGE, message);
startActivity (intent);
}
}
package com.example.myfirstapp;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.view.MenuItem;
import android.widget.TextView;
public class DisplayMessageActivity extends Activity {
@ SuppressLint ("NewApi")
@ Override
protected void onCreate (Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_display_message);
/ / Show the Up button in the action bar.
setupActionBar ();
if (Build.VERSION.SDK_INT> = Build.VERSION_CODES.HONEYCOMB) {
getActionBar () setDisplayHomeAsUpEnabled (true);.
}
Intent intent = getIntent ();
String message = intent.getStringExtra (MainActivity.EXTRA_MESSAGE);
TextView textView = new TextView (this);
textView.setTextSize (40);
textView.setText (message);
setContentView (textView);
}
/ **
* Set up the {@ link android.app.ActionBar}, if the API is available.
* /
@ TargetApi (Build.VERSION_CODES.HONEYCOMB)
private void setupActionBar () {
if (Build.VERSION.SDK_INT> = Build.VERSION_CODES.HONEYCOMB) {
getActionBar () setDisplayHomeAsUpEnabled (true);.
}
}
@ Override
public boolean onOptionsItemSelected (MenuItem item) {
switch (item.getItemId ()) {
case android.R.id.home:
/ / This ID represents the Home or Up button. In the case of this
/ / Activity, the Up button is shown. Use NavUtils to allow users
/ / To navigate up one level in the application structure. For
/ / More details, see the Navigation pattern on Android Design:
/ /
/ / Http://developer.android.com/design/patterns/navigation.html # up-vs-back
/ /
NavUtils.navigateUpFromSameTask (this);
return true;
}
return super.onOptionsItemSelected (item);
}
}
xmlns: tools = "http://schemas.android.com/tools"
android: layout_width = "match_parent"
android: layout_height = "match_parent"
android: paddingBottom = "@ dimen / activity_vertical_margin"
android: paddingLeft = "@ dimen / activity_horizontal_margin"
android: paddingRight = "@ dimen / activity_horizontal_margin"
android: paddingTop = "@ dimen / activity_vertical_margin"
tools: context = "DisplayMessageActivity.">android: layout_width = "wrap_content"
android: layout_height = "wrap_content"
/>
xmlns: tools = "http://schemas.android.com/tools"
android: layout_width = "match_parent"
android: layout_height = "match_parent"
android: orientation = "horizontal">android: layout_weight = "1"
android: layout_width = "0dp"
android: layout_height = "wrap_content"
android: hint = "@ string / edit_message" />
android: layout_width = "wrap_content"
android: layout_height = "wrap_content"
android: text = "@ string / button_send"
android: onClick = "sendMessage" />
My First App Enter a message Send Settings MainActivity My Message
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Reply:
DisplayMessageActivity this you registered yet inside the AndroidManaifeset.xml
Reply:
This has been registered, it is automatically added to the eclipse. Can not run android version and what relationship, the tutorial that their code is running on android4.0, I this is 4.3
android: name = "com.example.myfirstapp.DisplayMessageActivity"
android: label = "@ string / title_activity_display_message"
android: parentActivityName = "com.example.myfirstapp.MainActivity">android: name = "android.support.PARENT_ACTIVITY"
android: value = "com.example.myfirstapp.MainActivity" />
Reply:
It does not matter what misstatements
Reply:
Control panel shows that, without being given
[2013-10-11 01:48:45 - MyFirstApp] ------------------------------
[2013-10-11 01:48:45 - MyFirstApp]! Android Launch
[2013-10-11 01:48:45 - MyFirstApp] adb is running normally
.[2013-10-11 01:48:45 - MyFirstApp] Performing com.example.myfirstapp.MainActivity activity launch
[2013-10-11 01:48:45 - MyFirstApp] Automatic Target Mode: using device '047faa901cd02ed8 '
[2013-10-11 01:48:45 - MyFirstApp] Uploading MyFirstApp.apk onto device '047faa901cd02ed8 '
[2013-10-11 01:48:45 - MyFirstApp] Installing MyFirstApp.apk ...
[2013-10-11 01:48:48 - MyFirstApp]! Success
[2013-10-11 01:48:48 - MyFirstApp] Starting activity com.example.myfirstapp.MainActivity on device 047faa901cd02ed8
[2013-10-11 01:48:48 - MyFirstApp] ActivityManager: Starting: Intent {act = android.intent.action.MAIN cat = [android.intent.category.LAUNCHER] cmp = com.example.myfirstapp / .MainActivity }
[2013-10-11 02:59:25 - MyFirstApp] ------------------------------
[2013-10-11 02:59:25 - MyFirstApp]! Android Launch
[2013-10-11 02:59:25 - MyFirstApp] adb is running normally
.[2013-10-11 02:59:25 - MyFirstApp] Performing com.example.myfirstapp.MainActivity activity launch
[2013-10-11 02:59:25 - MyFirstApp] Automatic Target Mode: using device '047faa901cd02ed8 '
[2013-10-11 02:59:25 - MyFirstApp] Uploading MyFirstApp.apk onto device '047faa901cd02ed8 '
[2013-10-11 02:59:25 - MyFirstApp] Installing MyFirstApp.apk ...
[2013-10-11 02:59:27 - MyFirstApp]! Success
[2013-10-11 02:59:27 - MyFirstApp] Starting activity com.example.myfirstapp.MainActivity on device 047faa901cd02ed8
[2013-10-11 02:59:28 - MyFirstApp] ActivityManager: Starting: Intent {act = android.intent.action.MAIN cat = [android.intent.category.LAUNCHER] cmp = com.example.myfirstapp / .MainActivity }
Reply:
This is Consle output without error.
Fat LogCat up to look at.
Reply:
setContentView (textView); Here it is dead.
Reply:
The setupActionBar (); commented try again.
Reply:
sendMessge (View v) did not call inside onCreate
Reply:
Yes, because wrong, it should be sendMessage (View view), now changed over, no problem. Thank you
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