我突然遇到这个问题。我已经浏览了本网站和其他人的一些帖子。以下是我尝试了解此问题原因时访问过的一些链接;
[ActionBarCompat: java.lang.IllegalStateException: You need to use a Theme.AppCompat
[.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity
据我所知，这些错误的原因在每种情况下都有所不同。我在下面发布了我的logicat片段。
05-30 20:20:23.278 13996-13996/ca.rvogl.tpbcui2 E/AndroidRuntime: FATAL EXCEPTION: main
Process: ca.rvogl.tpbcui2, PID: 13996
java.lang.RuntimeException: Unable to start activity ComponentInfo{ca.rvogl.tpbcui2/ca.rvogl.tpbcui2.Views.BowlerActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.support.v7.app.AppCompatDelegateImplV9.createSubDecor(AppCompatDelegateImplV9.java:354)
at android.support.v7.app.AppCompatDelegateImplV9.ensureSubDecor(AppCompatDelegateImplV9.java:323)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at ca.rvogl.tpbcui2.Views.BowlerActivity.onCreate(BowlerActivity.java:50)
at android.app.Activity.performCreate(Activity.java:6679)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Android Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ca.rvogl.tpbcui2">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="Tenpin Bowling Companion"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true">
<activity
android:name=".views.MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".views.BowlerActivity">
</activity>
</application>
</manifest>
Styles.xml
<resources>
<!-- 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>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
</resources>
BowlerAcitivity - 根据Logicat的说法，它失败了。
public class BowlerActivity extends AppCompatActivity {
private BowlerAdapter mAdapter;
private List<Bowler> bowlersList = new ArrayList<>();
private CoordinatorLayout coordinatorLayout;
private RecyclerView recyclerView;
private TextView noBowlersView;
private DatabaseHelper db;
private TextView myText;
private String savedExtra;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bowler);
//Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
//setSupportActionBar(toolbar);
//getSupportActionBar().setDisplayHomeAsUpEnabled(true);
//getSupportActionBar().setDisplayShowHomeEnabled(true);
savedExtra = String.valueOf(getIntent().getIntExtra("leagueId",2)); //<<<< ADDED
myText = (TextView) findViewById(R.id.tvLeagueId);
final String s = myText.toString();
coordinatorLayout = findViewById(R.id.coordinator_layout);
recyclerView = findViewById(R.id.recycler_view);
noBowlersView = findViewById(R.id.empty_bowlers_view);
db = new DatabaseHelper(this);
bowlersList.addAll(db.getAllBowlers(savedExtra));
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.add_bowler_fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showBowlerDialog(false, null, -1);
}
});
mAdapter = new BowlerAdapter(this, bowlersList);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.addItemDecoration(new MyDividerItemDecoration(this, LinearLayoutManager.VERTICAL, 16));
recyclerView.setAdapter(mAdapter);
toggleEmptyBowlers();
//On Long Click On The RecyclerView Item An Alert Dialog Is Opened With The Option To Choose Edit/Delete
recyclerView.addOnItemTouchListener(new RecyclerTouchListener(this,
recyclerView, new RecyclerTouchListener.ClickListener() {
@Override
public void onClick(View view, final int position) {
//Intent myIntent = new Intent(getApplicationContext(), SeriesActivity.class);
//startActivity(myIntent);
}
@Override
public void onLongClick(View view, int position) {
showActionsDialog(position);
}
}));
}
//Inserting New Bowler In The Database And Refreshing The List
private void createBowler(String bowler, String leagueId) {
//Inserting Bowler In The Database And Getting Newly Inserted Bowler Id
long id = db.insertBowler(bowler, leagueId);
//Get The Newly Inserted Bowler From The Database
Bowler n = db.getBowler(leagueId);
if (n != null) {
//Adding New Bowler To The Array List At Position 0
bowlersList.add(0, n);
//Refreshing The List
mAdapter.notifyDataSetChanged();
toggleEmptyBowlers();
}
}
//Updating Bowler In The Database And Updating The Item In The List By Its Position
private void updateBowler(String name, int position) {
Bowler n = bowlersList.get(position);
//Updating Bowler Text
n.setName(name);
n.setLeagueId(savedExtra);
//Updating The Bowler In The Database
db.updateBowler(n);
//Refreshing The List
bowlersList.set(position, n);
mAdapter.notifyItemChanged(position);
toggleEmptyBowlers();
}
//Deleting Bowler From SQLite Database And Removing The Bowler Item From The List By Its Position
private void deleteBowler(int position) {
// deleting the note from db
db.deleteBowler(bowlersList.get(position));
//Removing The Bowler From The List
bowlersList.remove(position);
mAdapter.notifyItemRemoved(position);
toggleEmptyBowlers();
}
//Opens Dialog With Edit/Delete Options
//Edit - 0
//Delete - 0
private void showActionsDialog(final int position) {
CharSequence colors[] = new CharSequence[]{"Edit", "Delete"};
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Choose option");
builder.setItems(colors, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (which == 0) {
showBowlerDialog(true, bowlersList.get(position), position);
} else {
deleteBowler(position);
}
}
});
builder.show();
}
//Show Alert Dialog With EditText Options to Enter/Edit A League
//When shouldUpdate = true, It Will Automatically Display Old Bowler Name And Change The Button Text To UPDATE
private void showBowlerDialog(final boolean shouldUpdate, final Bowler bowler, final int position) {
LayoutInflater layoutInflaterAndroid = LayoutInflater.from(getApplicationContext());
View view = layoutInflaterAndroid.inflate(R.layout.dialog_bowler, null);
AlertDialog.Builder alertDialogBuilderUserInput = new AlertDialog.Builder(BowlerActivity.this);
alertDialogBuilderUserInput.setView(view);
final EditText inputBowler = view.findViewById(R.id.etBowlerNameInput);
myText.setText(savedExtra);
TextView dialogTitle = view.findViewById(R.id.dialog_title);
dialogTitle.setText(!shouldUpdate ? getString(R.string.lbl_new_bowler_title) : getString(R.string.lbl_edit_bowler_title));
if (shouldUpdate && bowler != null) {
inputBowler.setText(bowler.getName());
myText.setText(bowler.getLeagueId());
}
alertDialogBuilderUserInput
.setCancelable(false)
.setPositiveButton(shouldUpdate ? "update" : "save", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialogBox, int id) {
}
})
.setNegativeButton("cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialogBox, int id) {
dialogBox.cancel();
}
});
final AlertDialog alertDialog = alertDialogBuilderUserInput.create();
alertDialog.show();
alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Show Toast Message When No Text Is Entered
if (TextUtils.isEmpty(inputBowler.getText().toString())) {
Toast.makeText(BowlerActivity.this, "Enter Bowler!", Toast.LENGTH_SHORT).show();
return;
} else {
alertDialog.dismiss();
}
//Check If User Is Updating Bowler
if (shouldUpdate && bowler != null) {
//Updating Bowler By Its Id
updateBowler(inputBowler.getText().toString(), position);
} else {
//Creating New Bowler
createBowler(inputBowler.getText().toString(), myText.getText().toString());
}
}
});
}
//Toggling List And Empty Bowler View
private void toggleEmptyBowlers() {
//You Can Check bowlerList.size() > 0
if (db.getBowlersCount() > 0) {
noBowlersView.setVisibility( View.GONE);
} else {
noBowlersView.setVisibility( View.VISIBLE);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate( R.menu.menu_main, menu );
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected( item );
}
}
不确定如何解决这个问题。我已经阅读了上面列出的文章，并尝试了提供的解决方案，但没有取得多大成功。我也尝试直接在布局上直接在布局设计器上更改主题。任何形式的帮助都将受到赞赏。
答案 0 :(得分：2)
因此，自从我发布的评论为您工作以来，我决定在此发布ehr解决方案，以便为其提供更多可见性并帮助其他用户。
<强>解
侯必须将主题设置为 var gridsize = 5;
var gridoption={ stroke: "#000000", strokeWidth: 1, selectable:false, strokeDashArray: [5, 5],evented:false};
for(var x=1;x<(canvas.width/gridsize);x++)
{
canvas.add(new fabric.Line([100*x, 0, 100*x, 600],gridoption));
canvas.add(new fabric.Line([0, 100*x, 600, 100*x],gridoption));
}
中的BowlerActivity。
Manifest