当我更新android studio时出现此错误，我花了几个小时试图弄清楚它的修复但是没有成功。代码是显示一个活动，该活动允许用户创建可以放置在文本中的注释，然后将其保存以供日后查看。
DisplayNote
public class DisplayNote extends AppCompatActivity {
private NoteDataBase mydb;
EditText name;
EditText content;
private CoordinatorLayout coordinatorLayout;
String dateString;
int id_To_Update = 0;
Snackbar snackbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.viewnotepad);
name = (EditText) findViewById(R.id.txtname);
content = (EditText) findViewById(R.id.txtcontent);
coordinatorLayout = (CoordinatorLayout) findViewById(R.id
.coordinatorLayout);
mydb = new NoteDataBase(this);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar2);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onBackPressed();
}
});
Bundle extras = getIntent().getExtras();
if (extras != null) {
int Value = extras.getInt("id");
if (Value > 0) {
snackbar = Snackbar
.make(coordinatorLayout, "Note Id : " + String.valueOf(Value), Snackbar.LENGTH_LONG);
snackbar.show();
Cursor rs = mydb.getData(Value);
id_To_Update = Value;
rs.moveToFirst();
String nam = rs.getString(rs.getColumnIndex(NoteDataBase.name));
String contents = rs.getString(rs.getColumnIndex(NoteDataBase.remark));
if (!rs.isClosed()) {
rs.close();
}
name.setText((CharSequence) nam);
content.setText((CharSequence) contents);
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.display_menu, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
super.onOptionsItemSelected(item);
switch (item.getItemId()) {
case R.id.Save:
Bundle extras = getIntent().getExtras();
Calendar c = Calendar.getInstance();
System.out.println("Current time => " + c.getTime());
SimpleDateFormat df = new SimpleDateFormat("dd-MMM-yyyy");
String formattedDate = df.format(c.getTime());
dateString = formattedDate;
if (extras != null) {
int Value = extras.getInt("id");
if (Value > 0) {
if (content.getText().toString().trim().equals("")
|| name.getText().toString().trim().equals("")) {
snackbar = Snackbar
.make(coordinatorLayout, "Please fill in name of the note", Snackbar.LENGTH_LONG);
snackbar.show();
} else {
if (mydb.updateNotes(id_To_Update, name.getText()
.toString(), dateString, content.getText()
.toString())) {
snackbar = Snackbar
.make(coordinatorLayout, "Note updated!", Snackbar.LENGTH_LONG);
snackbar.show();
} else {
snackbar = Snackbar
.make(coordinatorLayout, "Error occurred when updating", Snackbar.LENGTH_LONG);
snackbar.show();
}
}
} else {
if (content.getText().toString().trim().equals("")
|| name.getText().toString().trim().equals("")) {
snackbar = Snackbar
.make(coordinatorLayout, "Please fill in content of the note", Snackbar.LENGTH_LONG);
snackbar.show();
} else {
if (mydb.insertNotes(name.getText().toString(), dateString,
content.getText().toString())) {
snackbar = Snackbar
.make(coordinatorLayout, "Note successfully added", Snackbar.LENGTH_LONG);
snackbar.show();
} else {
snackbar = Snackbar
.make(coordinatorLayout, "Error occurred when saving note", Snackbar.LENGTH_LONG);
snackbar.show();
}
}
}
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
Viewnotepad.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="10">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar2"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="scroll|enterAlways" />
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="horizontal"
android:weightSum="2" >
<TextView
android:id="@+id/textView1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:gravity="top|center"
android:text="NAME" />
<EditText
android:id="@+id/txtname"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="top|center"
android:inputType="textAutoCorrect"
android:hint="Name of note here"
android:layout_weight="1.5"
>
</EditText>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="9"
android:orientation="vertical"
android:weightSum="2" >
<EditText
android:id="@+id/txtcontent"
android:hint="Your text here"
android:gravity="top|start"
android:layout_width="match_parent"
android:layout_height="0dp"
android:inputType="textMultiLine">
</EditText>
</LinearLayout>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
错误记录
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.shakeel.appidea2/com.example.shakeel.appidea2.diary.DisplayNote}: android.view.InflateException: Binary XML file line #3: Binary XML file line #3: Error inflating class <unknown>
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2434)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2494)
at android.app.ActivityThread.access$900(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1356)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5551)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
Caused by: android.view.InflateException: Binary XML file line #3: Binary XML file line #3: Error inflating class <unknown>
at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129)
at com.example.shakeel.appidea2.diary.DisplayNote.onCreate(DisplayNote.java:34)
at android.app.Activity.performCreate(Activity.java:6272)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2494)
at android.app.ActivityThread.access$900(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1356)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5551)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
Caused by: android.view.InflateException: Binary XML file line #3: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:645)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129)
at com.example.shakeel.appidea2.diary.DisplayNote.onCreate(DisplayNote.java:34)
at android.app.Activity.performCreate(Activity.java:6272)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2494)
at android.app.ActivityThread.access$900(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1356)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5551)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at android.view.LayoutInflater.createView(LayoutInflater.java:619)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129)
at com.example.shakeel.appidea2.diary.DisplayNote.onCreate(DisplayNote.java:34)
at android.app.Activity.performCreate(Activity.java:6272)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2494)
at android.app.ActivityThread.access$900(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1356)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5551)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
Caused by: java.lang.IllegalArgumentException: You need to use a Theme.AppCompat theme (or descendant) with the design library.
at android.support.design.widget.ThemeUtils.checkAppCompatTheme(ThemeUtils.java:34)
at android.support.design.widget.CoordinatorLayout.<init>(CoordinatorLayout.java:182)
at android.support.design.widget.CoordinatorLayout.<init>(CoordinatorLayout.java:176)
at java.lang.reflect.Constructor.newInstance(Native Method)
at android.view.LayoutInflater.createView(LayoutInflater.java:619)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129)
at com.example.shakeel.appidea2.diary.DisplayNote.onCreate(DisplayNote.java:34)
at android.app.Activity.performCreate(Activity.java:6272)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2494)
at android.app.ActivityThread.access$900(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1356)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5551)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
答案 0 :(得分：0)
Caused by: java.lang.IllegalArgumentException: You need to use a Theme.AppCompat theme (or descendant) with the design library.
您正在使用AppCompatActivity和CoordinatorLayout，但您的活动主题（清单中android:theme上的<activity>）不会继承Theme.AppCompat