1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.videoeditor; 18 19 import android.app.ListActivity; 20 import android.content.Intent; 21 import android.os.Bundle; 22 import android.view.View; 23 import android.widget.ListView; 24 import android.widget.TextView; 25 26 /** 27 * Activity that lists all transition effects for user to choose. 28 */ 29 public class TransitionsActivity extends ListActivity { 30 // Input transition category 31 public static final String PARAM_AFTER_MEDIA_ITEM_ID = "media_item_id"; 32 public static final String PARAM_TRANSITION_ID = "transition_id"; 33 public static final String PARAM_MINIMUM_DURATION = "min_duration"; 34 public static final String PARAM_DEFAULT_DURATION = "default_duration"; 35 public static final String PARAM_MAXIMUM_DURATION = "max_duration"; 36 37 // Increment transition duration in milliseconds 38 private static final long INCREMENT_TRANSITION = 100; 39 40 // Output transition type 41 public static final String PARAM_TRANSITION_TYPE = "transition"; 42 public static final String PARAM_TRANSITION_DURATION = "duration"; 43 44 // State keys 45 private static final String STATE_KEY_TRANSITION_DURATION = "duration"; 46 47 // Instance variables 48 private TextView mTransitionDurationView; 49 private View mTransitionLeftBtn, mTransitionRightBtn; 50 private TransitionsAdapter mAdapter; 51 private long mMinTransitionDurationMs, mMaxTransitionDurationMs, mTransitionDurationMs; 52 53 @Override onCreate(Bundle savedInstanceState)54 public void onCreate(Bundle savedInstanceState) { 55 super.onCreate(savedInstanceState); 56 setContentView(R.layout.transition_list_view); 57 setFinishOnTouchOutside(true); 58 59 mTransitionDurationView = (TextView)findViewById(R.id.transition_duration); 60 mTransitionLeftBtn = findViewById(R.id.duration_left); 61 mTransitionRightBtn = findViewById(R.id.duration_right); 62 63 mMinTransitionDurationMs = getIntent().getLongExtra(PARAM_MINIMUM_DURATION, 0); 64 mMinTransitionDurationMs = (mMinTransitionDurationMs / INCREMENT_TRANSITION) * 65 INCREMENT_TRANSITION; 66 67 mMaxTransitionDurationMs = getIntent().getLongExtra(PARAM_MAXIMUM_DURATION, 0); 68 mMaxTransitionDurationMs = (mMaxTransitionDurationMs / INCREMENT_TRANSITION) * 69 INCREMENT_TRANSITION; 70 71 if (savedInstanceState == null) { 72 mTransitionDurationMs = getIntent().getLongExtra(PARAM_DEFAULT_DURATION, 0); 73 } else { 74 mTransitionDurationMs = savedInstanceState.getLong(STATE_KEY_TRANSITION_DURATION); 75 } 76 mTransitionDurationMs = (mTransitionDurationMs / INCREMENT_TRANSITION) * 77 INCREMENT_TRANSITION; 78 79 updateTransitionDuration(); 80 81 // Create the list adapter 82 mAdapter = new TransitionsAdapter(this, getListView()); 83 setListAdapter(mAdapter); 84 85 final int transitionType = getIntent().getIntExtra(PARAM_TRANSITION_TYPE, -1); 86 if (transitionType >= 0) { 87 // Select the current transition 88 final TransitionType[] transitions = mAdapter.getTransitions(); 89 for (int i = 0; i < transitions.length; i++) { 90 if (transitions[i].getType() == transitionType) { 91 setSelection(i); 92 break; 93 } 94 } 95 } 96 } 97 98 @Override onPause()99 public void onPause() { 100 super.onPause(); 101 102 if (mAdapter != null) { 103 mAdapter.onPause(); 104 } 105 } 106 107 @Override onDestroy()108 public void onDestroy() { 109 super.onDestroy(); 110 111 if (mAdapter != null) { 112 mAdapter.onDestroy(); 113 mAdapter = null; 114 } 115 } 116 117 @Override onSaveInstanceState(Bundle outState)118 public void onSaveInstanceState(Bundle outState) { 119 super.onSaveInstanceState(outState); 120 121 outState.putLong(STATE_KEY_TRANSITION_DURATION, mTransitionDurationMs); 122 } 123 124 @Override onListItemClick(ListView l, View v, int position, long id)125 public void onListItemClick(ListView l, View v, int position, long id) { 126 final Intent extras = new Intent(); 127 extras.putExtra(PARAM_TRANSITION_TYPE, 128 ((TransitionType)mAdapter.getItem(position)).getType()); 129 extras.putExtra(PARAM_AFTER_MEDIA_ITEM_ID, 130 getIntent().getStringExtra(PARAM_AFTER_MEDIA_ITEM_ID)); 131 extras.putExtra(PARAM_TRANSITION_ID, 132 getIntent().getStringExtra(PARAM_TRANSITION_ID)); 133 extras.putExtra(PARAM_TRANSITION_DURATION, mTransitionDurationMs); 134 135 setResult(RESULT_OK, extras); 136 finish(); 137 } 138 onClickHandler(View target)139 public void onClickHandler(View target) { 140 switch (target.getId()) { 141 case R.id.duration_left: { 142 if (mTransitionDurationMs > mMinTransitionDurationMs) { 143 mTransitionDurationMs -= INCREMENT_TRANSITION; 144 updateTransitionDuration(); 145 } 146 break; 147 } 148 149 case R.id.duration_right: { 150 if (mTransitionDurationMs < mMaxTransitionDurationMs) { 151 mTransitionDurationMs += INCREMENT_TRANSITION; 152 updateTransitionDuration(); 153 } 154 break; 155 } 156 157 default: { 158 break; 159 } 160 } 161 } 162 163 @Override onSearchRequested()164 public boolean onSearchRequested() { 165 return false; 166 } 167 168 /** 169 * Updates the transition duration and the state of the buttons. 170 */ updateTransitionDuration()171 private void updateTransitionDuration() { 172 mTransitionDurationView.setText(getString(R.string.transitions_duration, 173 (((float)mTransitionDurationMs) / 1000))); 174 175 mTransitionLeftBtn.setEnabled(mTransitionDurationMs > mMinTransitionDurationMs); 176 mTransitionRightBtn.setEnabled(mTransitionDurationMs < mMaxTransitionDurationMs); 177 } 178 } 179