Java tutorial
/* This file is auto-generated from ErrorFragment.java. DO NOT MODIFY. */ /* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package android.support.v17.leanback.app; import android.os.Bundle; import android.support.v17.leanback.R; import android.support.v17.leanback.widget.TitleView; import android.text.TextUtils; import android.util.Log; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.ImageView; import android.widget.TextView; import android.graphics.Paint; import android.graphics.PixelFormat; import android.graphics.Paint.FontMetricsInt; import android.graphics.drawable.Drawable; /** * A fragment for displaying an error indication. */ public class ErrorSupportFragment extends BrandedSupportFragment { private ViewGroup mErrorFrame; private ImageView mImageView; private TextView mTextView; private Button mButton; private Drawable mDrawable; private CharSequence mMessage; private String mButtonText; private View.OnClickListener mButtonClickListener; private Drawable mBackgroundDrawable; private boolean mIsBackgroundTranslucent = true; /** * Sets the default background. * * @param translucent True to set a translucent background. */ public void setDefaultBackground(boolean translucent) { mBackgroundDrawable = null; mIsBackgroundTranslucent = translucent; updateBackground(); updateMessage(); } /** * Returns true if the background is translucent. */ public boolean isBackgroundTranslucent() { return mIsBackgroundTranslucent; } /** * Sets a drawable for the fragment background. * * @param drawable The drawable used for the background. */ public void setBackgroundDrawable(Drawable drawable) { mBackgroundDrawable = drawable; if (drawable != null) { final int opacity = drawable.getOpacity(); mIsBackgroundTranslucent = (opacity == PixelFormat.TRANSLUCENT || opacity == PixelFormat.TRANSPARENT); } updateBackground(); updateMessage(); } /** * Returns the background drawable. May be null if a default is used. */ public Drawable getBackgroundDrawable() { return mBackgroundDrawable; } /** * Sets the drawable to be used for the error image. * * @param drawable The drawable used for the error image. */ public void setImageDrawable(Drawable drawable) { mDrawable = drawable; updateImageDrawable(); } /** * Returns the drawable used for the error image. */ public Drawable getImageDrawable() { return mDrawable; } /** * Sets the error message. * * @param message The error message. */ public void setMessage(CharSequence message) { mMessage = message; updateMessage(); } /** * Returns the error message. */ public CharSequence getMessage() { return mMessage; } /** * Sets the button text. * * @param text The button text. */ public void setButtonText(String text) { mButtonText = text; updateButton(); } /** * Returns the button text. */ public String getButtonText() { return mButtonText; } /** * Set the button click listener. * * @param clickListener The click listener for the button. */ public void setButtonClickListener(View.OnClickListener clickListener) { mButtonClickListener = clickListener; updateButton(); } /** * Returns the button click listener. */ public View.OnClickListener getButtonClickListener() { return mButtonClickListener; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View root = inflater.inflate(R.layout.lb_error_fragment, container, false); mErrorFrame = (ViewGroup) root.findViewById(R.id.error_frame); updateBackground(); installTitleView(inflater, mErrorFrame, savedInstanceState); mImageView = (ImageView) root.findViewById(R.id.image); updateImageDrawable(); mTextView = (TextView) root.findViewById(R.id.message); updateMessage(); mButton = (Button) root.findViewById(R.id.button); updateButton(); FontMetricsInt metrics = getFontMetricsInt(mTextView); int underImageBaselineMargin = container.getResources() .getDimensionPixelSize(R.dimen.lb_error_under_image_baseline_margin); setTopMargin(mTextView, underImageBaselineMargin + metrics.ascent); int underMessageBaselineMargin = container.getResources() .getDimensionPixelSize(R.dimen.lb_error_under_message_baseline_margin); setTopMargin(mButton, underMessageBaselineMargin - metrics.descent); return root; } private void updateBackground() { if (mErrorFrame != null) { if (mBackgroundDrawable != null) { mErrorFrame.setBackground(mBackgroundDrawable); } else { mErrorFrame.setBackgroundColor(mErrorFrame.getResources() .getColor(mIsBackgroundTranslucent ? R.color.lb_error_background_color_translucent : R.color.lb_error_background_color_opaque)); } } } private void updateMessage() { if (mTextView != null) { mTextView.setText(mMessage); mTextView.setVisibility(TextUtils.isEmpty(mMessage) ? View.GONE : View.VISIBLE); } } private void updateImageDrawable() { if (mImageView != null) { mImageView.setImageDrawable(mDrawable); mImageView.setVisibility(mDrawable == null ? View.GONE : View.VISIBLE); } } private void updateButton() { if (mButton != null) { mButton.setText(mButtonText); mButton.setOnClickListener(mButtonClickListener); mButton.setVisibility(TextUtils.isEmpty(mButtonText) ? View.GONE : View.VISIBLE); mButton.requestFocus(); } } @Override public void onStart() { super.onStart(); mErrorFrame.requestFocus(); } private static FontMetricsInt getFontMetricsInt(TextView textView) { Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); paint.setTextSize(textView.getTextSize()); paint.setTypeface(textView.getTypeface()); return paint.getFontMetricsInt(); } private static void setTopMargin(TextView textView, int topMargin) { ViewGroup.MarginLayoutParams lp = (ViewGroup.MarginLayoutParams) textView.getLayoutParams(); lp.topMargin = topMargin; textView.setLayoutParams(lp); } }