我正在学习Audacity课程,决定将所有代码打出来,但是当我尝试运行应用程序时遇到了错误。
我遇到了以下错误:
10-27 19:17:41.871 26679-26679/com.example.vhuhwavho.friendlychat W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x41bbec08)
10-27 19:17:41.871 26679-26679/com.example.vhuhwavho.friendlychat E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.vhuhwavho.friendlychat, PID: 26679
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.vhuhwavho.friendlychat/com.example.vhuhwavho.friendlychat.MainActivity}: android.view.InflateException: Binary XML file line #0: Error inflating class Button
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2334)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)
at android.app.ActivityThread.access$900(ActivityThread.java:169)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1280)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5487)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class Button
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:719)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at com.example.vhuhwavho.friendlychat.MainActivity.onCreate(MainActivity.java:42)
at android.app.Activity.performCreate(Activity.java:5451)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)
at android.app.ActivityThread.access$900(ActivityThread.java:169)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1280)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5487)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.UnsupportedOperationException: Can't convert to color: type=0x1
at android.content.res.TypedArray.getColor(TypedArray.java:327)
at android.support.v7.widget.TintTypedArray.getColor(TintTypedArray.java:163)
at android.support.v7.widget.ThemeUtils.getThemeAttrColor(ThemeUtils.java:65)
at android.support.v7.widget.AppCompatDrawableManager.createDefaultButtonColorStateList(AppCompatDrawableManager.java:584)
at android.support.v7.widget.AppCompatDrawableManager.getTintList(AppCompatDrawableManager.java:536)
at android.support.v7.widget.AppCompatBackgroundHelper.loadFromAttributes(AppCompatBackgroundHelper.java:53)
at android.support.v7.widget.AppCompatButton.<init>(AppCompatButton.java:74)
at android.support.v7.widget.AppCompatButton.<init>(AppCompatButton.java:67)
at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:109)
at android.support.v7.app.AppCompatDelegateImplV9.createView(AppCompatDelegateImplV9.java:1024)
at android.support.v7.app.AppCompatDelegateImplV9.onCreateView(AppCompatDelegateImplV9.java:1081)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:690)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at com.example.vhuhwavho.friendlychat.MainActivity.onCreate(MainActivity.java:42)
at android.app.Activity.performCreate(Activity.java:5451)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)
at android.app.ActivityThread.access$900(ActivityThread.java:169)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1280)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5487)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
10-27 19:17:46.696 26679-26679/com.example.vhuhwavho.friendlychat I/Process: Sending signal. PID: 26679 SIG: 9
这是主活动:
package com.example.vhuhwavho.friendlychat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.InputFilter;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.ProgressBar;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
public static final String ANONYMOUS = "anonymous";
public static final int DEFAULT_MSG_LENGTH_LIMIT = 1000;
private ListView mMessageListView;
private MessageAdapter mMessageAdapter;
private ProgressBar mProgressBar;
private ImageButton mPhotoPickerButton;
private EditText mMessageEditText;
private Button mSendButton;
private String mUsername;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mUsername = ANONYMOUS;
// Initialize references to views
mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
mMessageListView = (ListView) findViewById(R.id.messageListView);
mPhotoPickerButton = (ImageButton) findViewById(R.id.photoPickerButton);
mMessageEditText = (EditText) findViewById(R.id.messageEditText);
mSendButton = (Button) findViewById(R.id.sendButton);
// Initialize message ListView and its adapter
List<FriendlyMessage> friendlyMessages = new ArrayList<>();
mMessageAdapter = new MessageAdapter(this, R.layout.item_message, friendlyMessages);
mMessageListView.setAdapter(mMessageAdapter);
// Initialize progress bar
mProgressBar.setVisibility(ProgressBar.INVISIBLE);
// ImagePickerButton shows an image picker to upload a image for a message
mPhotoPickerButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// TODO: Fire an intent to show an image picker
}
});
// Enable Send button when there's text to send
mMessageEditText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
if (charSequence.toString().trim().length() > 0) {
mSendButton.setEnabled(true);
} else {
mSendButton.setEnabled(false);
}
}
@Override
public void afterTextChanged(Editable editable) {
}
});
mMessageEditText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(DEFAULT_MSG_LENGTH_LIMIT)});
// Send button sends a message and clears the EditText
mSendButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// TODO: Send messages on click
// Clear input box
mMessageEditText.setText("");
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
return super.onOptionsItemSelected(item);
}
}
这是 @layout
中的activity_main.xml
:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
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="com.example.vhuhwavho.friendlychat.MainActivity">
<ListView
android:id="@+id/messageListView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/linearLayout"
android:stackFromBottom="true"
android:divider="@android:color/transparent"
android:transcriptMode="alwaysScroll"
tools:listitem="@layout/item_message"/>
<LinearLayout
android:id="@+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:orientation="horizontal">
<ImageButton
android:id="@+id/photoPickerButton"
android:layout_width="36dp"
android:layout_height="36dp"
android:background="@android:drawable/ic_menu_gallery" />
<EditText
android:id="@+id/messageEditText"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="1" />
<Button
android:id="@+id/sendButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:enabled="false"
android:text="@string/send_button_label"/>
</LinearLayout>
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"/>
</RelativeLayout>
这是在@layout
中的item_message.xml
文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/activity_horizontal_margin"
android:layout_marginStart="@dimen/activity_horizontal_margin"
android:orientation="vertical">
<ImageView
android:id="@+id/photoImageView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true" />
<TextView
android:id="@+id/messageTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0"
android:textAppearance="?android:attr/textAppearanceLarge"
tools:text="Message" />
<TextView
android:id="@+id/nameTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0"
android:textAppearance="?android:attr/textAppearanceSmall"
tools:text="Name" />
</LinearLayout>
这是在
@drawale
中的button_selector.xml
文件:<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:color="#999999" android:state_enabled="false"/>
<item android:color="@color/colorAccent" android:state_enabled="true"/>
</selector>
这里是
@values
下的colors.xml
文件:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#FF9800</color>
<color name="colorPrimaryDark">#E65100</color>
<color name="colorAccent">#2E7D32</color>
<color name="colorTitle">#ffffff</color>
</resources>
这是在@values
中的strings.xml
文件:
<resources>
<string name="app_name">Friendly Chat</string>
<string name="sign_out">Sign Out</string>
<string name="send_button_label">Send</string>
</resources>
这里是位于
@values
文件夹中的styles.xml
:<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
<!--<item name="android:colorButtonNormal">@drawable/button_selector</item>-->
<item name="colorButtonNormal">@drawable/button_selector</item>
<item name="android:buttonStyle">@style/FriendlyButtonStyle</item>
</style>
<style name="FriendlyButtonStyle" parent="Widget.AppCompat.Button">
<item name="android:textColor">@color/colorTitle</item>
</style>
</resources>
这里是
@menu
中的menu.xml
文件:<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/sign_out_menu"
android:title="@string/sign_out"
app:showAsAction="never"/>
</menu>
这里是
@values
中的dimens.xml
文件:
<resources>
<!-- Default screen margins, per the Android Design guidelines. -->
<dimen name="activity_horizontal_margin">16dp</dimen>
<dimen name="activity_vertical_margin">16dp</dimen>
</resources>
这里是在
@values
中的(w820dp) dimens.xml
:
<resources>
<!-- Example customization of dimensions originally defined in res/values/dimens.xml
(such as screen margins) for screens with more than 820dp of available width. This
would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
<dimen name="activity_horizontal_margin">64dp</dimen>
</resources>
请帮我解决这个错误。
MainActivity.java:42
?因为在发布的MainActivity
类中,这一行是mUsername = ANONYMOUS;
,与错误无关。 - pleftcolours.xml
文件。 - pleftstrings.xml
- pleft