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我正在處理一個非常簡單的壁紙設置。該應用程序在模擬器上正常工作，但不適用於設備。我也嘗試過其他設備上的應用程序，結果是一樣的。Android運行時異常。無法啓動活動
MainActivity.java：
public class MainActivity extends AppCompatActivity {
ImageView iv;
FloatingActionButton fab,fab2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitleTextColor(getResources().getColor(R.color.white));
setSupportActionBar(toolbar);
fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setImageResource(R.drawable.plus_24x24);
fab.setBackgroundColor(getResources().getColor(R.color.colorAccent));
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), 9999);
}
});
fab2=(FloatingActionButton)findViewById(R.id.fab2);
fab2.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
fab2.setImageResource(R.drawable.ic_done_white);
fab2.setVisibility(View.INVISIBLE);
fab2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
WallpaperManager myWallpaperManager
= WallpaperManager.getInstance(getApplicationContext());
try {
myWallpaperManager.setBitmap(((BitmapDrawable)iv.getDrawable()).getBitmap());
Snackbar.make(findViewById(android.R.id.content), "Wallpaper set", Snackbar.LENGTH_SHORT).show();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
iv=(ImageView)findViewById(R.id.imageView);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 9999 && resultCode == RESULT_OK && data != null) {
fab2.setVisibility(View.VISIBLE);
Uri imageUri = data.getData();
iv.setImageURI(imageUri);
}
else {
Snackbar.make(findViewById(android.R.id.content), "No image selected", Snackbar.LENGTH_SHORT).show();
}
}
}
activity_main.xml中：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent"
android:layout_width="match_parent"
xmlns:android.support.design="http://schemas.android.com/tools"
android:orientation="horizontal"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.v7.widget.CardView
android:id="@+id/card_view"
android:layout_gravity="center"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/toolbar"
android:layout_marginTop="@dimen/ef_margin_medium"
android:layout_marginLeft="@dimen/ef_margin_medium"
android:layout_marginRight="@dimen/ef_margin_medium"
android:layout_marginBottom="@dimen/ef_margin_medium"
ads:cardCornerRadius="6dp"
ads:cardElevation="6dp"
>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_marginEnd="@dimen/ef_margin_medium"
android:layout_marginRight="@dimen/ef_margin_medium"
android:layout_marginBottom="@dimen/ef_margin_medium"
/>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/imageView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentBottom="true" />
</android.support.v7.widget.CardView>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab2"
android:layout_width="wrap_content"
android:layout_height="51dp"
app:fabSize="mini"
android:backgroundTint="@color/colorAccent"
android:layout_marginTop="34dp"
android:layout_marginRight="11dp"
android:layout_marginEnd="11dp"
android:layout_alignParentTop="true"
android:layout_alignRight="@+id/card_view"
android:layout_alignEnd="@+id/card_view" />
</RelativeLayout>
錯誤日誌：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.entripleaardee.incognitogallery, PID: 4571
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.entripleaardee.incognitogallery/com.entripleaardee.incognitogallery.MainActivity}: android.view.InflateException: Binary XML file line #55: Binary XML file line #55: Error inflating class <unknown>
請提供您的日誌消息中接下來的幾個字符串。 – MaxV
大概顯示你的清單文件。它有''？ –
您在上的＃55行有錯誤。似乎你沒有支持庫。我相信FAB在com.android.support:design中。你可以將「compile」com.android.support:design:25.0.1'「添加到你的gradle dependencies中 –