50. Android 多媒体技术——SoundPool播放音效
50.1 SoundPool
MediaPlayer虽然也能播放音频,但是它有资源占用量较高,延迟时间较长,不支持多个音频同时播放等缺点。
SoundPool一般用来播放密集、急促而短暂的音效。
50.2 使用SoundPool
准备音频文件
新建一个SoundActivity
修改跳转
布局
<?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="match_parent"
android:layout_height="match_parent"
tools:context=".SoundActivity">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/recyclerView"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
调用
适配器 MyAdapter.java
package com.dingjiaxiong.mymediarecorder;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> implements View.OnClickListener {
private final List<SoundActivity.Sound> data;
private final Context context;
private final RecyclerView recyclerView;
private OnItemClickListener listener;
public MyAdapter(List<SoundActivity.Sound> data, RecyclerView recyclerView, Context context) {
this.data = data;
this.recyclerView = recyclerView;
this.context = context;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
TextView textView = new TextView(context);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
layoutParams.topMargin = 18;
layoutParams.leftMargin = 18;
textView.setLayoutParams(layoutParams);
textView.setOnClickListener(this);
return new MyViewHolder(textView);
}
@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
((TextView) holder.itemView).setText(data.get(position).getName());
}
@Override
public int getItemCount() {
return data.size();
}
@Override
public void onClick(View v) {
if (listener != null) {
listener.onItemClick(recyclerView.getChildAdapterPosition(v));
}
}
public void setOnItemClickListener(OnItemClickListener listener) {
this.listener = listener;
}
interface OnItemClickListener {
void onItemClick(int position);
}
class MyViewHolder extends RecyclerView.ViewHolder {
public MyViewHolder(@NonNull View itemView) {
super(itemView);
}
}
}
调用
package com.dingjiaxiong.mymediarecorder;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.media.SoundPool;
import android.os.Bundle;
import android.view.View;
import java.util.ArrayList;
import java.util.List;
public class SoundActivity extends AppCompatActivity implements MyAdapter.OnItemClickListener {
private SoundPool soundPool;
static class Sound {
String name;
int soundId;
public Sound(String name, int soundId) {
this.name = name;
this.soundId = soundId;
}
public int getSoundId() {
return soundId;
}
public String getName() {
return name;
}
}
List<Sound> data;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sound);
RecyclerView recyclerView = findViewById(R.id.recyclerView);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
recyclerView.setLayoutManager(linearLayoutManager);
soundPool = new SoundPool.Builder().setMaxStreams(6).build();
data = new ArrayList<>();
data.add(new Sound("a4", soundPool.load(this, R.raw.a4, 1)));
data.add(new Sound("a5", soundPool.load(this, R.raw.a5, 1)));
data.add(new Sound("a6", soundPool.load(this, R.raw.a6, 1)));
data.add(new Sound("a7", soundPool.load(this, R.raw.a7, 1)));
data.add(new Sound("a8", soundPool.load(this, R.raw.a8, 1)));
data.add(new Sound("a9", soundPool.load(this, R.raw.a9, 1)));
MyAdapter myAdapter = new MyAdapter(data, recyclerView, this);
myAdapter.setOnItemClickListener(this);
recyclerView.setAdapter(myAdapter);
}
@Override
public void onItemClick(int position) {
Sound sound = data.get(position);
soundPool.play(sound.getSoundId(),
1.0f, 1.0f, 1, 0, 1.0f);
}
@Override
protected void onDestroy() {
super.onDestroy();
for (Sound datum : data) {
soundPool.unload(datum.getSoundId());
}
soundPool.release();
}
}
运行
是有声音的。OK
标签:recyclerView,50,SoundPool,音效,new,import,android,data,public From: https://www.cnblogs.com/55zjc/p/16709777.html