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全屏显示
android:scaleType="matrix"
水平居中显示 android:layout_gravity="center"
<ImageView
android:id="@+id/imageView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
app:srcCompat="@drawable/niboer"
tools:ignore="MissingConstraints" />
android:scaleType="fitCenter"
<ImageView
android:id="@+id/imageView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="fitCenter"
app:srcCompat="@drawable/fo2"
tools:ignore="MissingConstraints" />
方法一
private Drawable getImageDrawableFromUrl(String url) {
try {
InputStream inputStream = (InputStream) new URL(url).getContent();
Drawable drawable = Drawable.createFromStream(inputStream, "image.jpg");
// Drawable drawable = Drawable.createFromStream(new URL(url).openStream(), "image.jpg");
// Drawable drawable = Drawable.createFromStream(getContext().getContentResolver().openInputStream(Uri.parse(url)), null);
return drawable;
} catch (IOException e) {
Log.d("VoicePopup", e.getMessage());
} catch (Exception e) {
Log.d("VoicePopup", e.getMessage());
}
return null;
}
Drawable drawable = getImageDrawableFromUrl(image);
imageView = findViewById(R.id.imageView);
imageView.setImageDrawable(drawable);
方法二
imageView = findViewById(R.id.imageView);
new Thread(new Runnable() {
@Override
public void run() {
try {
InputStream is = (InputStream) new URL(image).getContent();
final Drawable d = Drawable.createFromStream(is, null);
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
imageView.setImageDrawable(d);
}
});
} catch (Exception e) {
}
}
}).start();
new Thread(new Runnable() {
@Override
public void run() {
try {
InputStream inputStream = new URL("https://img.netkiller.cn/2d/f4873238-7860-11ee-8344-0242ac12000c.png").openStream();
final Drawable drawable = Drawable.createFromStream(inputStream, null);
runOnUiThread(new Runnable() {
@Override
public void run() {
imageView.setImageDrawable(drawable);
}
});
} catch (Exception e) {
}
}
}).start();
方法三
try {
URL url = new URL("https://img.netkiller.cn/2d/f4873238-7860-11ee-8344-0242ac12000c.png");
new Thread(new Runnable() {
@Override
public void run() {
Bitmap bitmap = null;
try {
bitmap = BitmapFactory.decodeStream(url.openStream());
showImg(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
} catch (MalformedURLException e) {
e.printStackTrace();
}
private void showImg(final Bitmap bitmap) {
runOnUiThread(new Runnable() {
@Override
public void run() {
imageView.setImageBitmap(bitmap);
}
});
}
旋转 PNG 动画效果，用于显示唱片播放效果
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
tools:context="cn.netkiller.album.MainActivity">
<ImageView
android:id="@+id/imageView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitCenter"
app:srcCompat="@drawable/fo2"
tools:ignore="MissingConstraints" />
<cn.netkiller.album.view.SoundWaveView
android:id="@+id/sound_wave_view"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_alignBottom="@id/imageView"
app:layout_constraintBottom_toBottomOf="@+id/imageView" />
<ImageView
android:id="@+id/imageViewWan"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_gravity="center"
app:layout_constraintBottom_toTopOf="@+id/sound_wave_view"
app:layout_constraintEnd_toEndOf="@+id/sound_wave_view"
app:layout_constraintStart_toStartOf="@+id/sound_wave_view"
app:srcCompat="@drawable/wan"
tools:ignore="MissingConstraints" />
</androidx.constraintlayout.widget.ConstraintLayout>
创建旋转动画效果 res/anim/rotate.xml
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android">
<rotate
android:duration="2000"
android:fromDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:repeatCount="-1"
android:toDegrees="359"></rotate>
</rotate>
Animation rotateAnimation = AnimationUtils.loadAnimation(this, R.anim.rotate);
LinearInterpolator linearInterpolator = new LinearInterpolator();
rotateAnimation.setInterpolator(linearInterpolator);
View imageViewWan = findViewById(R.id.imageViewWan);
imageViewWan.startAnimation(rotateAnimation);
<TextClock
android:id="@+id/textClockTime"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="3"
android:format12Hour="hh:mm"
android:format24Hour="HH:mm"
android:gravity="center"
android:textColor="@android:color/black"
android:textSize="40sp"
android:textStyle="bold" />
<TextClock
android:id="@+id/textViewDate"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:format12Hour="yyyy/MM/dd E"
android:format24Hour="yyyy/MM/dd E"
android:gravity="center"
android:textColor="@android:color/black"
android:textSize="16sp" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<TextClock
android:id="@+id/textClockTime"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#00000000"
android:format24Hour="HH:mm"
android:gravity="center"
android:textColor="@color/white"
android:textSize="48sp" />
<TextClock
android:id="@+id/textViewDate"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:format12Hour="MM月dd日 EEEE"
android:format24Hour="MM月dd日 EEEE"
android:gravity="center"
android:textColor="#70ffffff"
android:textSize="16sp" />
</LinearLayout>
style属性：
@android:style/Widget.ProgressBar.Horizontal：水平进度条 @android:style/Widget.ProgressBar.Inverse：普通大小的进度条 @android:style/Widget.ProgressBar.Large：大环形进度条 @android:style/Widget.ProgressBar.Large.Inverse：大环形进度条 @android:style/Widget.ProgressBar.Small：小环形进度条 @android:style/Widget.ProgressBar.Small.Inverse：小环形进度条
案例
<ProgressBar
android:id="@+id/progressBar"
style="@style/Widget.AppCompat.ProgressBar.Horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="13dp"
android:progress="0"
android:visibility="invisible"
app:layout_constraintBottom_toTopOf="@+id/textView"
tools:ignore="MissingConstraints"
tools:layout_editor_absoluteX="179dp" />
<ProgressBar
android:id="@+id/progressBar"
style="@style/Widget.AppCompat.ProgressBar.Horizontal"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_marginBottom="13dp"
android:max="100"
android:maxHeight="32dip"
android:minHeight="32dip"
android:progress="0"
android:progressDrawable="@drawable/progress"
android:progressTint="#43A047"
android:visibility="invisible"
app:layout_constraintBottom_toTopOf="@+id/textView"
tools:ignore="MissingConstraints"
tools:layout_editor_absoluteX="179dp" />
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<!-- 设置背景色 -->
<item android:id="@android:id/background">
<shape>
<corners android:radius="20dp"></corners>
<solid android:color="#CCCCCC"></solid>
</shape>
</item>
<!-- 设置进度条颜色 -->
<item android:id="@android:id/progress">
<clip>
<shape>
<gradient
android:angle="45"
android:endColor="#2DC8FE"
android:startColor="#149EFF"></gradient>
<!-- 设置圆角 -->
<corners android:radius="20dp"></corners>
</shape>
</clip>
</item>
</layer-list>
String[] list = Arrays.asList("Apple", "Banana", "Orange", "Watermelon",
"Pear", "Grape", "Pineapple", "Strawberry", "Cherry", "Mango";
ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1,data);
ListView listView = (ListView) findViewById(R.id.history);
listView.setAdapter(adapter);
<ListView
android:id="@+id/history"
android:layout_width="368dp"
android:layout_height="444dp"
android:scrollbars="horizontal"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="59dp" />
List<String> list = Arrays.asList("Apple", "Banana", "Orange", "Watermelon","Pear", "Grape", "Pineapple", "Strawberry", "Cherry", "Mango");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1,list);
ListView listView = (ListView) findViewById(R.id.history);
listView.setAdapter(adapter);
List<String> list = Arrays.asList("Text 文本", "URL 网址", "电话号码", "短信","开启应用", "地址", "日历", "图片", "邮箱", "GPS 坐标");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,list);
final ListView listView = (ListView) findViewById(R.id.schemaList);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String text = listView.getItemAtPosition(position)+"";
Log.e("WRITE","position="+position+", text="+text);
}
});
public class MainActivity extends Activity implements OnItemClickListener, OnScrollListener
List<String> list = Arrays.asList("Text 文本", "URL 网址", "电话号码", "短信","开启应用", "地址", "日历", "图片", "邮箱", "GPS 坐标");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,list);
final ListView listView = (ListView) findViewById(R.id.schemaList);
listView.setAdapter(adapter);
listView.setOnItemClickListener(this);
listView.setOnScrollListener(this);
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String text = listView.getItemAtPosition(position)+"";
Log.e("WRITE","position="+position+", text="+text);
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
switch (scrollState) {
case SCROLL_STATE_FLING:
Log.i("tag", "用户手指离开屏幕后，因惯性继续滑动");
Map<String,Object>map = new HashMap<String,Object>();
map.put("icon", R.drawable.ic_launcher);
map.put("text", "新增加项目");
dataList.add(map);
adapter.notifyDataSetChanged();
break;
case SCROLL_STATE_IDLE:
Log.i("tag","已经停止滑动");
break;
case SCROLL_STATE_TOUCH_SCROLL:
Log.i("tag", "手指未离开屏幕，屏幕继续滑动");
break;
}
}